diff --git a/lib/asciidoctor-revealjs/converter.rb b/lib/asciidoctor-revealjs/converter.rb
index 6891c353..32c4fb1d 100644
--- a/lib/asciidoctor-revealjs/converter.rb
+++ b/lib/asciidoctor-revealjs/converter.rb
@@ -519,25 +519,25 @@ def convert_admonition(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if (has_role? 'aside') or (has_role? 'speaker') or (has_role? 'notes'); 
-      ; _buf << ("<aside class=\"notes\">".freeze); _buf << ((resolve_content).to_s); 
-      ; _buf << ("</aside>".freeze); 
+      _buf = []; if (has_role? 'aside') or (has_role? 'speaker') or (has_role? 'notes'); 
+      ; _buf << ("<aside class=\"notes\">"); _buf << (resolve_content); 
+      ; _buf << ("</aside>"); 
       ; else; 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['admonitionblock', (attr :name), role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ("<table><tr><td class=\"icon\">".freeze); 
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['admonitionblock', (attr :name), role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << ("<table><tr><td class=\"icon\">"); 
       ; 
       ; if @document.attr? :icons, 'font'; 
       ; icon_mapping = Hash['caution', 'fire', 'important', 'exclamation-circle', 'note', 'info-circle', 'tip', 'lightbulb-o', 'warning', 'warning']; 
-      ; _slim_controls2 << ("<i".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = %(fa fa-#{icon_mapping[attr :name]}); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover1).to_s); _slim_controls2 << ("\"".freeze); end; _slim_codeattributes2 = (attr :textlabel || @caption); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" title".freeze); else; _slim_controls2 << (" title=\"".freeze); _slim_controls2 << ((_slim_codeattributes2).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << ("></i>".freeze); 
+      ; _slim_controls2 << ("<i"); _temple_html_attributeremover1 = []; _slim_codeattributes1 = %(fa fa-#{icon_mapping[attr :name]}); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover1); _slim_controls2 << ("\""); end; _slim_codeattributes2 = (attr :textlabel || @caption); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" title"); else; _slim_controls2 << (" title=\""); _slim_controls2 << (_slim_codeattributes2); _slim_controls2 << ("\""); end; end; _slim_controls2 << ("></i>"); 
       ; elsif @document.attr? :icons; 
-      ; _slim_controls2 << ("<img".freeze); _slim_codeattributes3 = icon_uri(attr :name); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes4 = @caption; if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" alt".freeze); else; _slim_controls2 << (" alt=\"".freeze); _slim_controls2 << ((_slim_codeattributes4).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">".freeze); 
+      ; _slim_controls2 << ("<img"); _slim_codeattributes3 = icon_uri(attr :name); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_codeattributes4 = @caption; if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" alt"); else; _slim_controls2 << (" alt=\""); _slim_controls2 << (_slim_codeattributes4); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">"); 
       ; else; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << (((attr :textlabel) || @caption).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("</td><td class=\"content\">".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << ((attr :textlabel) || @caption); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("</td><td class=\"content\">"); 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</td></tr></table>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); end; _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</td></tr></table>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); end; _buf = _buf.join("")
     end
   end
 
@@ -545,13 +545,13 @@ def convert_audio(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['audioblock', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['audioblock', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((captioned_title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<div class=\"content\"><audio".freeze); 
-      ; _slim_codeattributes1 = media_uri(attr :target); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes1).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes2 = (option? 'autoplay'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" autoplay".freeze); else; _slim_controls2 << (" autoplay=\"".freeze); _slim_controls2 << ((_slim_codeattributes2).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes3 = !(option? 'nocontrols'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" controls".freeze); else; _slim_controls2 << (" controls=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes4 = (option? 'loop'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" loop".freeze); else; _slim_controls2 << (" loop=\"".freeze); _slim_controls2 << ((_slim_codeattributes4).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">Your browser does not support the audio tag.</audio></div>".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (captioned_title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<div class=\"content\"><audio"); 
+      ; _slim_codeattributes1 = media_uri(attr :target); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes1); _slim_controls2 << ("\""); end; end; _slim_codeattributes2 = (option? 'autoplay'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" autoplay"); else; _slim_controls2 << (" autoplay=\""); _slim_controls2 << (_slim_codeattributes2); _slim_controls2 << ("\""); end; end; _slim_codeattributes3 = !(option? 'nocontrols'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" controls"); else; _slim_controls2 << (" controls=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_codeattributes4 = (option? 'loop'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" loop"); else; _slim_controls2 << (" loop=\""); _slim_controls2 << (_slim_codeattributes4); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">Your browser does not support the audio tag.</audio></div>"); 
       ; 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -559,27 +559,27 @@ def convert_colist(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['colist', @style, role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['colist', @style, role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; if @document.attr? :icons; 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; if @document.attr? :icons; 
       ; font_icons = @document.attr? :icons, 'font'; 
-      ; _slim_controls2 << ("<table>".freeze); 
+      ; _slim_controls2 << ("<table>"); 
       ; items.each_with_index do |item, i|; 
       ; num = i + 1; 
-      ; _slim_controls2 << ("<tr><td>".freeze); 
+      ; _slim_controls2 << ("<tr><td>"); 
       ; 
       ; if font_icons; 
-      ; _slim_controls2 << ("<i class=\"conum\"".freeze); _slim_codeattributes1 = num; if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" data-value".freeze); else; _slim_controls2 << (" data-value=\"".freeze); _slim_controls2 << ((_slim_codeattributes1).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << ("></i><b>".freeze); 
-      ; _slim_controls2 << ((num).to_s); 
-      ; _slim_controls2 << ("</b>".freeze); else; 
-      ; _slim_controls2 << ("<img".freeze); _slim_codeattributes2 = icon_uri("callouts/#{num}"); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes2).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes3 = num; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" alt".freeze); else; _slim_controls2 << (" alt=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">".freeze); 
-      ; end; _slim_controls2 << ("</td><td>".freeze); _slim_controls2 << ((item.text).to_s); 
-      ; _slim_controls2 << ("</td></tr>".freeze); end; _slim_controls2 << ("</table>".freeze); else; 
-      ; _slim_controls2 << ("<ol>".freeze); 
+      ; _slim_controls2 << ("<i class=\"conum\""); _slim_codeattributes1 = num; if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" data-value"); else; _slim_controls2 << (" data-value=\""); _slim_controls2 << (_slim_codeattributes1); _slim_controls2 << ("\""); end; end; _slim_controls2 << ("></i><b>"); 
+      ; _slim_controls2 << (num); 
+      ; _slim_controls2 << ("</b>"); else; 
+      ; _slim_controls2 << ("<img"); _slim_codeattributes2 = icon_uri("callouts/#{num}"); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes2); _slim_controls2 << ("\""); end; end; _slim_codeattributes3 = num; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" alt"); else; _slim_controls2 << (" alt=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">"); 
+      ; end; _slim_controls2 << ("</td><td>"); _slim_controls2 << (item.text); 
+      ; _slim_controls2 << ("</td></tr>"); end; _slim_controls2 << ("</table>"); else; 
+      ; _slim_controls2 << ("<ol>"); 
       ; items.each do |item|; 
-      ; _slim_controls2 << ("<li><p>".freeze); _slim_controls2 << ((item.text).to_s); 
-      ; _slim_controls2 << ("</p></li>".freeze); end; _slim_controls2 << ("</ol>".freeze); end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<li><p>"); _slim_controls2 << (item.text); 
+      ; _slim_controls2 << ("</p></li>"); end; _slim_controls2 << ("</ol>"); end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -587,60 +587,60 @@ def convert_dlist(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; case @style; 
+      _buf = []; case @style; 
       ; when 'qanda'; 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['qlist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['qlist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<ol>".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<ol>"); 
       ; items.each do |questions, answer|; 
-      ; _slim_controls2 << ("<li>".freeze); 
+      ; _slim_controls2 << ("<li>"); 
       ; [*questions].each do |question|; 
-      ; _slim_controls2 << ("<p><em>".freeze); _slim_controls2 << ((question.text).to_s); 
-      ; _slim_controls2 << ("</em></p>".freeze); end; unless answer.nil?; 
+      ; _slim_controls2 << ("<p><em>"); _slim_controls2 << (question.text); 
+      ; _slim_controls2 << ("</em></p>"); end; unless answer.nil?; 
       ; if answer.text?; 
-      ; _slim_controls2 << ("<p>".freeze); _slim_controls2 << ((answer.text).to_s); 
-      ; _slim_controls2 << ("</p>".freeze); end; if answer.blocks?; 
-      ; _slim_controls2 << ((answer.content).to_s); 
-      ; end; end; _slim_controls2 << ("</li>".freeze); end; _slim_controls2 << ("</ol>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); when 'horizontal'; 
-      ; _slim_controls3 = html_tag('div', { :id => @id, :class => ['hdlist', role] }.merge(data_attrs(@attributes))) do; _slim_controls4 = ''; 
+      ; _slim_controls2 << ("<p>"); _slim_controls2 << (answer.text); 
+      ; _slim_controls2 << ("</p>"); end; if answer.blocks?; 
+      ; _slim_controls2 << (answer.content); 
+      ; end; end; _slim_controls2 << ("</li>"); end; _slim_controls2 << ("</ol>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); when 'horizontal'; 
+      ; _slim_controls3 = html_tag('div', { :id => @id, :class => ['hdlist', role] }.merge(data_attrs(@attributes))) do; _slim_controls4 = []; 
       ; if title?; 
-      ; _slim_controls4 << ("<div class=\"title\">".freeze); _slim_controls4 << ((title).to_s); 
-      ; _slim_controls4 << ("</div>".freeze); end; _slim_controls4 << ("<table>".freeze); 
+      ; _slim_controls4 << ("<div class=\"title\">"); _slim_controls4 << (title); 
+      ; _slim_controls4 << ("</div>"); end; _slim_controls4 << ("<table>"); 
       ; if (attr? :labelwidth) || (attr? :itemwidth); 
-      ; _slim_controls4 << ("<colgroup><col".freeze); 
-      ; _slim_codeattributes1 = ((attr? :labelwidth) ? %(width:#{(attr :labelwidth).chomp '%'}%;) : nil); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls4 << (" style".freeze); else; _slim_controls4 << (" style=\"".freeze); _slim_controls4 << ((_slim_codeattributes1).to_s); _slim_controls4 << ("\"".freeze); end; end; _slim_controls4 << ("><col".freeze); 
-      ; _slim_codeattributes2 = ((attr? :itemwidth) ? %(width:#{(attr :itemwidth).chomp '%'}%;) : nil); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls4 << (" style".freeze); else; _slim_controls4 << (" style=\"".freeze); _slim_controls4 << ((_slim_codeattributes2).to_s); _slim_controls4 << ("\"".freeze); end; end; _slim_controls4 << ("></colgroup>".freeze); 
+      ; _slim_controls4 << ("<colgroup><col"); 
+      ; _slim_codeattributes1 = ((attr? :labelwidth) ? %(width:#{(attr :labelwidth).chomp '%'}%;) : nil); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls4 << (" style"); else; _slim_controls4 << (" style=\""); _slim_controls4 << (_slim_codeattributes1); _slim_controls4 << ("\""); end; end; _slim_controls4 << ("><col"); 
+      ; _slim_codeattributes2 = ((attr? :itemwidth) ? %(width:#{(attr :itemwidth).chomp '%'}%;) : nil); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls4 << (" style"); else; _slim_controls4 << (" style=\""); _slim_controls4 << (_slim_codeattributes2); _slim_controls4 << ("\""); end; end; _slim_controls4 << ("></colgroup>"); 
       ; end; items.each do |terms, dd|; 
-      ; _slim_controls4 << ("<tr><td".freeze); 
-      ; _temple_html_attributeremover1 = ''; _slim_codeattributes3 = ['hdlist1',('strong' if option? 'strong')]; if Array === _slim_codeattributes3; _slim_codeattributes3 = _slim_codeattributes3.flatten; _slim_codeattributes3.map!(&:to_s); _slim_codeattributes3.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes3.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes3).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls4 << (" class=\"".freeze); _slim_controls4 << ((_temple_html_attributeremover1).to_s); _slim_controls4 << ("\"".freeze); end; _slim_controls4 << (">".freeze); 
+      ; _slim_controls4 << ("<tr><td"); 
+      ; _temple_html_attributeremover1 = []; _slim_codeattributes3 = ['hdlist1',('strong' if option? 'strong')]; if Array === _slim_codeattributes3; _slim_codeattributes3 = _slim_codeattributes3.flatten; _slim_codeattributes3.map!(&:to_s); _slim_codeattributes3.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes3.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes3); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls4 << (" class=\""); _slim_controls4 << (_temple_html_attributeremover1); _slim_controls4 << ("\""); end; _slim_controls4 << (">"); 
       ; terms = [*terms]; 
       ; last_term = terms.last; 
       ; terms.each do |dt|; 
-      ; _slim_controls4 << ((dt.text).to_s); 
+      ; _slim_controls4 << (dt.text); 
       ; if dt != last_term; 
-      ; _slim_controls4 << ("<br>".freeze); 
-      ; end; end; _slim_controls4 << ("</td><td class=\"hdlist2\">".freeze); 
+      ; _slim_controls4 << ("<br>"); 
+      ; end; end; _slim_controls4 << ("</td><td class=\"hdlist2\">"); 
       ; unless dd.nil?; 
       ; if dd.text?; 
-      ; _slim_controls4 << ("<p>".freeze); _slim_controls4 << ((dd.text).to_s); 
-      ; _slim_controls4 << ("</p>".freeze); end; if dd.blocks?; 
-      ; _slim_controls4 << ((dd.content).to_s); 
-      ; end; end; _slim_controls4 << ("</td></tr>".freeze); end; _slim_controls4 << ("</table>".freeze); _slim_controls4; end; _buf << ((_slim_controls3).to_s); else; 
-      ; _slim_controls5 = html_tag('div', { :id => @id, :class => ['dlist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls6 = ''; 
+      ; _slim_controls4 << ("<p>"); _slim_controls4 << (dd.text); 
+      ; _slim_controls4 << ("</p>"); end; if dd.blocks?; 
+      ; _slim_controls4 << (dd.content); 
+      ; end; end; _slim_controls4 << ("</td></tr>"); end; _slim_controls4 << ("</table>"); _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); else; 
+      ; _slim_controls5 = html_tag('div', { :id => @id, :class => ['dlist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls6 = []; 
       ; if title?; 
-      ; _slim_controls6 << ("<div class=\"title\">".freeze); _slim_controls6 << ((title).to_s); 
-      ; _slim_controls6 << ("</div>".freeze); end; _slim_controls6 << ("<dl>".freeze); 
+      ; _slim_controls6 << ("<div class=\"title\">"); _slim_controls6 << (title); 
+      ; _slim_controls6 << ("</div>"); end; _slim_controls6 << ("<dl>"); 
       ; items.each do |terms, dd|; 
       ; [*terms].each do |dt|; 
-      ; _slim_controls6 << ("<dt".freeze); _temple_html_attributeremover2 = ''; _slim_codeattributes4 = ('hdlist1' unless @style); if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover2 << ((_slim_codeattributes4.join(" ")).to_s); else; _temple_html_attributeremover2 << ((_slim_codeattributes4).to_s); end; _temple_html_attributeremover2; if !_temple_html_attributeremover2.empty?; _slim_controls6 << (" class=\"".freeze); _slim_controls6 << ((_temple_html_attributeremover2).to_s); _slim_controls6 << ("\"".freeze); end; _slim_controls6 << (">".freeze); _slim_controls6 << ((dt.text).to_s); 
-      ; _slim_controls6 << ("</dt>".freeze); end; unless dd.nil?; 
-      ; _slim_controls6 << ("<dd>".freeze); 
+      ; _slim_controls6 << ("<dt"); _temple_html_attributeremover2 = []; _slim_codeattributes4 = ('hdlist1' unless @style); if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover2 << (_slim_codeattributes4.join(" ")); else; _temple_html_attributeremover2 << (_slim_codeattributes4); end; _temple_html_attributeremover2 = _temple_html_attributeremover2.join(""); if !_temple_html_attributeremover2.empty?; _slim_controls6 << (" class=\""); _slim_controls6 << (_temple_html_attributeremover2); _slim_controls6 << ("\""); end; _slim_controls6 << (">"); _slim_controls6 << (dt.text); 
+      ; _slim_controls6 << ("</dt>"); end; unless dd.nil?; 
+      ; _slim_controls6 << ("<dd>"); 
       ; if dd.text?; 
-      ; _slim_controls6 << ("<p>".freeze); _slim_controls6 << ((dd.text).to_s); 
-      ; _slim_controls6 << ("</p>".freeze); end; if dd.blocks?; 
-      ; _slim_controls6 << ((dd.content).to_s); 
-      ; end; _slim_controls6 << ("</dd>".freeze); end; end; _slim_controls6 << ("</dl>".freeze); _slim_controls6; end; _buf << ((_slim_controls5).to_s); end; _buf
+      ; _slim_controls6 << ("<p>"); _slim_controls6 << (dd.text); 
+      ; _slim_controls6 << ("</p>"); end; if dd.blocks?; 
+      ; _slim_controls6 << (dd.content); 
+      ; end; _slim_controls6 << ("</dd>"); end; end; _slim_controls6 << ("</dl>"); _slim_controls6 = _slim_controls6.join(""); end; _buf << (_slim_controls5); end; _buf = _buf.join("")
     end
   end
 
@@ -648,11 +648,11 @@ def convert_document(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; slides_content = self.content; 
+      _buf = []; slides_content = self.content; 
       ; content_for :slides do; 
       ; unless noheader; 
       ; unless (header_docinfo = docinfo :header, '-revealjs.html').empty?; 
-      ; _buf << ((header_docinfo).to_s); 
+      ; _buf << (header_docinfo); 
       ; end; if header?; 
       ; bg_image = (attr? 'title-slide-background-image') ? (image_uri(attr 'title-slide-background-image')) : nil; 
       ; bg_video = (attr? 'title-slide-background-video') ? (media_uri(attr 'title-slide-background-video')) : nil; 
@@ -671,30 +671,30 @@ def convert_document(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ("<section".freeze); _temple_html_attributeremover1 = ''; _temple_html_attributemerger1 = []; _temple_html_attributemerger1[0] = "title"; _temple_html_attributemerger1[1] = ''; _slim_codeattributes1 = role; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributemerger1[1] << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributemerger1[1] << ((_slim_codeattributes1).to_s); end; _temple_html_attributemerger1[1]; _temple_html_attributeremover1 << ((_temple_html_attributemerger1.reject(&:empty?).join(" ")).to_s); _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _buf << (" class=\"".freeze); _buf << ((_temple_html_attributeremover1).to_s); _buf << ("\"".freeze); end; _buf << (" data-state=\"title\"".freeze); _slim_codeattributes2 = (attr 'title-slide-transition'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" data-transition".freeze); else; _buf << (" data-transition=\"".freeze); _buf << ((_slim_codeattributes2).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes3 = (attr 'title-slide-transition-speed'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-transition-speed".freeze); else; _buf << (" data-transition-speed=\"".freeze); _buf << ((_slim_codeattributes3).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes4 = (attr 'title-slide-background'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-background".freeze); else; _buf << (" data-background=\"".freeze); _buf << ((_slim_codeattributes4).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes5 = (attr 'title-slide-background-size'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-background-size".freeze); else; _buf << (" data-background-size=\"".freeze); _buf << ((_slim_codeattributes5).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes6 = bg_image; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-image".freeze); else; _buf << (" data-background-image=\"".freeze); _buf << ((_slim_codeattributes6).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes7 = bg_video; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-video".freeze); else; _buf << (" data-background-video=\"".freeze); _buf << ((_slim_codeattributes7).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes8 = (attr 'title-slide-background-video-loop'); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-video-loop".freeze); else; _buf << (" data-background-video-loop=\"".freeze); _buf << ((_slim_codeattributes8).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes9 = (attr 'title-slide-background-video-muted'); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-video-muted".freeze); else; _buf << (" data-background-video-muted=\"".freeze); _buf << ((_slim_codeattributes9).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes10 = (attr 'title-slide-background-opacity'); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-opacity".freeze); else; _buf << (" data-background-opacity=\"".freeze); _buf << ((_slim_codeattributes10).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes11 = (attr 'title-slide-background-iframe'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-iframe".freeze); else; _buf << (" data-background-iframe=\"".freeze); _buf << ((_slim_codeattributes11).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes12 = (attr 'title-slide-background-color'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-color".freeze); else; _buf << (" data-background-color=\"".freeze); _buf << ((_slim_codeattributes12).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes13 = (attr 'title-slide-background-repeat'); if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-repeat".freeze); else; _buf << (" data-background-repeat=\"".freeze); _buf << ((_slim_codeattributes13).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes14 = (attr 'title-slide-background-position'); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-position".freeze); else; _buf << (" data-background-position=\"".freeze); _buf << ((_slim_codeattributes14).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes15 = (attr 'title-slide-background-transition'); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-transition".freeze); else; _buf << (" data-background-transition=\"".freeze); _buf << ((_slim_codeattributes15).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<section"); _temple_html_attributeremover1 = []; _temple_html_attributemerger1 = []; _temple_html_attributemerger1[0] = "title"; _temple_html_attributemerger1[1] = []; _slim_codeattributes1 = role; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributemerger1[1] << (_slim_codeattributes1.join(" ")); else; _temple_html_attributemerger1[1] << (_slim_codeattributes1); end; _temple_html_attributemerger1[1] = _temple_html_attributemerger1[1].join(""); _temple_html_attributeremover1 << (_temple_html_attributemerger1.reject(&:empty?).join(" ")); _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _buf << (" class=\""); _buf << (_temple_html_attributeremover1); _buf << ("\""); end; _buf << (" data-state=\"title\""); _slim_codeattributes2 = (attr 'title-slide-transition'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" data-transition"); else; _buf << (" data-transition=\""); _buf << (_slim_codeattributes2); _buf << ("\""); end; end; _slim_codeattributes3 = (attr 'title-slide-transition-speed'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-transition-speed"); else; _buf << (" data-transition-speed=\""); _buf << (_slim_codeattributes3); _buf << ("\""); end; end; _slim_codeattributes4 = (attr 'title-slide-background'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-background"); else; _buf << (" data-background=\""); _buf << (_slim_codeattributes4); _buf << ("\""); end; end; _slim_codeattributes5 = (attr 'title-slide-background-size'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-background-size"); else; _buf << (" data-background-size=\""); _buf << (_slim_codeattributes5); _buf << ("\""); end; end; _slim_codeattributes6 = bg_image; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-image"); else; _buf << (" data-background-image=\""); _buf << (_slim_codeattributes6); _buf << ("\""); end; end; _slim_codeattributes7 = bg_video; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-video"); else; _buf << (" data-background-video=\""); _buf << (_slim_codeattributes7); _buf << ("\""); end; end; _slim_codeattributes8 = (attr 'title-slide-background-video-loop'); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-video-loop"); else; _buf << (" data-background-video-loop=\""); _buf << (_slim_codeattributes8); _buf << ("\""); end; end; _slim_codeattributes9 = (attr 'title-slide-background-video-muted'); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-video-muted"); else; _buf << (" data-background-video-muted=\""); _buf << (_slim_codeattributes9); _buf << ("\""); end; end; _slim_codeattributes10 = (attr 'title-slide-background-opacity'); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-opacity"); else; _buf << (" data-background-opacity=\""); _buf << (_slim_codeattributes10); _buf << ("\""); end; end; _slim_codeattributes11 = (attr 'title-slide-background-iframe'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-iframe"); else; _buf << (" data-background-iframe=\""); _buf << (_slim_codeattributes11); _buf << ("\""); end; end; _slim_codeattributes12 = (attr 'title-slide-background-color'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-color"); else; _buf << (" data-background-color=\""); _buf << (_slim_codeattributes12); _buf << ("\""); end; end; _slim_codeattributes13 = (attr 'title-slide-background-repeat'); if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-repeat"); else; _buf << (" data-background-repeat=\""); _buf << (_slim_codeattributes13); _buf << ("\""); end; end; _slim_codeattributes14 = (attr 'title-slide-background-position'); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-position"); else; _buf << (" data-background-position=\""); _buf << (_slim_codeattributes14); _buf << ("\""); end; end; _slim_codeattributes15 = (attr 'title-slide-background-transition'); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-transition"); else; _buf << (" data-background-transition=\""); _buf << (_slim_codeattributes15); _buf << ("\""); end; end; _buf << (">"); 
       ; if (_title_obj = doctitle partition: true, use_fallback: true).subtitle?; 
-      ; _buf << ("<h1>".freeze); _buf << ((slice_text _title_obj.title, (_slice = header.option? :slice)).to_s); 
-      ; _buf << ("</h1><h2>".freeze); _buf << ((slice_text _title_obj.subtitle, _slice).to_s); 
-      ; _buf << ("</h2>".freeze); else; 
-      ; _buf << ("<h1>".freeze); _buf << ((@header.title).to_s); 
-      ; _buf << ("</h1>".freeze); end; preamble = @document.find_by context: :preamble; 
+      ; _buf << ("<h1>"); _buf << (slice_text _title_obj.title, (_slice = header.option? :slice)); 
+      ; _buf << ("</h1><h2>"); _buf << (slice_text _title_obj.subtitle, _slice); 
+      ; _buf << ("</h2>"); else; 
+      ; _buf << ("<h1>"); _buf << (@header.title); 
+      ; _buf << ("</h1>"); end; preamble = @document.find_by context: :preamble; 
       ; unless preamble.nil? or preamble.length == 0; 
-      ; _buf << ("<div class=\"preamble\">".freeze); _buf << ((preamble.pop.content).to_s); 
-      ; _buf << ("</div>".freeze); end; _buf << ((generate_authors(@document)).to_s); 
-      ; _buf << ("</section>".freeze); 
-      ; end; end; _buf << ((slides_content).to_s); 
+      ; _buf << ("<div class=\"preamble\">"); _buf << (preamble.pop.content); 
+      ; _buf << ("</div>"); end; _buf << (generate_authors(@document)); 
+      ; _buf << ("</section>"); 
+      ; end; end; _buf << (slides_content); 
       ; unless (footer_docinfo = docinfo :footer, '-revealjs.html').empty?; 
-      ; _buf << ((footer_docinfo).to_s); 
+      ; _buf << (footer_docinfo); 
       ; 
-      ; end; end; _buf << ("<!DOCTYPE html><html".freeze); 
-      ; _slim_codeattributes16 = (attr :lang, 'en' unless attr? :nolang); if _slim_codeattributes16; if _slim_codeattributes16 == true; _buf << (" lang".freeze); else; _buf << (" lang=\"".freeze); _buf << ((_slim_codeattributes16).to_s); _buf << ("\"".freeze); end; end; _buf << ("><head><meta charset=\"utf-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui\"><title>".freeze); 
+      ; end; end; _buf << ("<!DOCTYPE html><html"); 
+      ; _slim_codeattributes16 = (attr :lang, 'en' unless attr? :nolang); if _slim_codeattributes16; if _slim_codeattributes16 == true; _buf << (" lang"); else; _buf << (" lang=\""); _buf << (_slim_codeattributes16); _buf << ("\""); end; end; _buf << ("><head><meta charset=\"utf-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui\"><title>"); 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << (((doctitle sanitize: true, use_fallback: true)).to_s); 
+      ; _buf << ((doctitle sanitize: true, use_fallback: true)); 
       ; 
-      ; _buf << ("</title>".freeze); if RUBY_ENGINE == 'opal' && JAVASCRIPT_PLATFORM == 'node'; 
+      ; _buf << ("</title>"); if RUBY_ENGINE == 'opal' && JAVASCRIPT_PLATFORM == 'node'; 
       ; revealjsdir = (attr :revealjsdir, 'node_modules/reveal.js'); 
       ; else; 
       ; revealjsdir = (attr :revealjsdir, 'reveal.js'); 
@@ -703,7 +703,7 @@ def convert_document(node, opts = {})
       ; end; cdn_base = %(#{asset_uri_scheme}//cdnjs.cloudflare.com/ajax/libs); 
       ; [:description, :keywords, :author, :copyright].each do |key|; 
       ; if attr? key; 
-      ; _buf << ("<meta".freeze); _slim_codeattributes17 = key; if _slim_codeattributes17; if _slim_codeattributes17 == true; _buf << (" name".freeze); else; _buf << (" name=\"".freeze); _buf << ((_slim_codeattributes17).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes18 = (attr key); if _slim_codeattributes18; if _slim_codeattributes18 == true; _buf << (" content".freeze); else; _buf << (" content=\"".freeze); _buf << ((_slim_codeattributes18).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<meta"); _slim_codeattributes17 = key; if _slim_codeattributes17; if _slim_codeattributes17 == true; _buf << (" name"); else; _buf << (" name=\""); _buf << (_slim_codeattributes17); _buf << ("\""); end; end; _slim_codeattributes18 = (attr key); if _slim_codeattributes18; if _slim_codeattributes18 == true; _buf << (" content"); else; _buf << (" content=\""); _buf << (_slim_codeattributes18); _buf << ("\""); end; end; _buf << (">"); 
       ; end; end; if attr? 'favicon'; 
       ; if (icon_href = attr 'favicon').empty?; 
       ; icon_href = 'favicon.ico'; 
@@ -712,13 +712,13 @@ def convert_document(node, opts = {})
       ; icon_type = icon_ext == '.ico' ? 'image/x-icon' : %(image/#{icon_ext.slice 1, icon_ext.length}); 
       ; else; 
       ; icon_type = 'image/x-icon'; 
-      ; end; _buf << ("<link rel=\"icon\" type=\"".freeze); _buf << ((icon_type).to_s); _buf << ("\" href=\"".freeze); _buf << ((icon_href).to_s); _buf << ("\">".freeze); 
+      ; end; _buf << ("<link rel=\"icon\" type=\""); _buf << (icon_type); _buf << ("\" href=\""); _buf << (icon_href); _buf << ("\">"); 
       ; end; linkcss = (attr? 'linkcss'); 
-      ; _buf << ("<link rel=\"stylesheet\" href=\"".freeze); _buf << ((revealjsdir).to_s); _buf << ("/dist/reset.css\"><link rel=\"stylesheet\" href=\"".freeze); 
-      ; _buf << ((revealjsdir).to_s); _buf << ("/dist/reveal.css\"><link rel=\"stylesheet\"".freeze); 
+      ; _buf << ("<link rel=\"stylesheet\" href=\""); _buf << (revealjsdir); _buf << ("/dist/reset.css\"><link rel=\"stylesheet\" href=\""); 
+      ; _buf << (revealjsdir); _buf << ("/dist/reveal.css\"><link rel=\"stylesheet\""); 
       ; 
       ; 
-      ; _slim_codeattributes19 = (attr :revealjs_customtheme, %(#{revealjsdir}/dist/theme/#{attr 'revealjs_theme', 'black'}.css)); if _slim_codeattributes19; if _slim_codeattributes19 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes19).to_s); _buf << ("\"".freeze); end; end; _buf << (" id=\"theme\"><!--This CSS is generated by the Asciidoctor reveal.js converter to further integrate AsciiDoc's existing semantic with reveal.js--><style type=\"text/css\">.reveal div.right {\n  float: right\n}\n\n/* source blocks */\n.reveal .listingblock.stretch > .content {\n  height: 100%\n}\n\n.reveal .listingblock.stretch > .content > pre {\n  height: 100%\n}\n\n.reveal .listingblock.stretch > .content > pre > code {\n  height: 100%;\n  max-height: 100%\n}\n\n/* auto-animate feature */\n/* hide the scrollbar when auto-animating source blocks */\n.reveal pre[data-auto-animate-target] {\n  overflow: hidden;\n}\n\n.reveal pre[data-auto-animate-target] code {\n  overflow: hidden;\n}\n\n/* add a min width to avoid horizontal shift on line numbers */\ncode.hljs .hljs-ln-line.hljs-ln-n {\n  min-width: 1.25em;\n}\n\n/* tables */\ntable {\n  border-collapse: collapse;\n  border-spacing: 0\n}\n\ntable {\n  margin-bottom: 1.25em;\n  border: solid 1px #dedede\n}\n\ntable thead tr th, table thead tr td, table tfoot tr th, table tfoot tr td {\n  padding: .5em .625em .625em;\n  font-size: inherit;\n  text-align: left\n}\n\ntable tr th, table tr td {\n  padding: .5625em .625em;\n  font-size: inherit\n}\n\ntable thead tr th, table tfoot tr th, table tbody tr td, table tr td, table tfoot tr td {\n  display: table-cell;\n  line-height: 1.6\n}\n\ntd.tableblock > .content {\n  margin-bottom: 1.25em\n}\n\ntd.tableblock > .content > :last-child {\n  margin-bottom: -1.25em\n}\n\ntable.tableblock, th.tableblock, td.tableblock {\n  border: 0 solid #dedede\n}\n\ntable.grid-all > thead > tr > .tableblock, table.grid-all > tbody > tr > .tableblock {\n  border-width: 0 1px 1px 0\n}\n\ntable.grid-all > tfoot > tr > .tableblock {\n  border-width: 1px 1px 0 0\n}\n\ntable.grid-cols > * > tr > .tableblock {\n  border-width: 0 1px 0 0\n}\n\ntable.grid-rows > thead > tr > .tableblock, table.grid-rows > tbody > tr > .tableblock {\n  border-width: 0 0 1px\n}\n\ntable.grid-rows > tfoot > tr > .tableblock {\n  border-width: 1px 0 0\n}\n\ntable.grid-all > * > tr > .tableblock:last-child, table.grid-cols > * > tr > .tableblock:last-child {\n  border-right-width: 0\n}\n\ntable.grid-all > tbody > tr:last-child > .tableblock, table.grid-all > thead:last-child > tr > .tableblock, table.grid-rows > tbody > tr:last-child > .tableblock, table.grid-rows > thead:last-child > tr > .tableblock {\n  border-bottom-width: 0\n}\n\ntable.frame-all {\n  border-width: 1px\n}\n\ntable.frame-sides {\n  border-width: 0 1px\n}\n\ntable.frame-topbot, table.frame-ends {\n  border-width: 1px 0\n}\n\n.reveal table th.halign-left, .reveal table td.halign-left {\n  text-align: left\n}\n\n.reveal table th.halign-right, .reveal table td.halign-right {\n  text-align: right\n}\n\n.reveal table th.halign-center, .reveal table td.halign-center {\n  text-align: center\n}\n\n.reveal table th.valign-top, .reveal table td.valign-top {\n  vertical-align: top\n}\n\n.reveal table th.valign-bottom, .reveal table td.valign-bottom {\n  vertical-align: bottom\n}\n\n.reveal table th.valign-middle, .reveal table td.valign-middle {\n  vertical-align: middle\n}\n\ntable thead th, table tfoot th {\n  font-weight: bold\n}\n\ntbody tr th {\n  display: table-cell;\n  line-height: 1.6\n}\n\ntbody tr th, tbody tr th p, tfoot tr th, tfoot tr th p {\n  font-weight: bold\n}\n\nthead {\n  display: table-header-group\n}\n\n.reveal table.grid-none th, .reveal table.grid-none td {\n  border-bottom: 0 !important\n}\n\n/* kbd macro */\nkbd {\n  font-family: \"Droid Sans Mono\", \"DejaVu Sans Mono\", monospace;\n  display: inline-block;\n  color: rgba(0, 0, 0, .8);\n  font-size: .65em;\n  line-height: 1.45;\n  background: #f7f7f7;\n  border: 1px solid #ccc;\n  -webkit-border-radius: 3px;\n  border-radius: 3px;\n  -webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 0 0 .1em white inset;\n  box-shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 0 0 .1em #fff inset;\n  margin: 0 .15em;\n  padding: .2em .5em;\n  vertical-align: middle;\n  position: relative;\n  top: -.1em;\n  white-space: nowrap\n}\n\n.keyseq kbd:first-child {\n  margin-left: 0\n}\n\n.keyseq kbd:last-child {\n  margin-right: 0\n}\n\n/* callouts */\n.conum[data-value] {\n  display: inline-block;\n  color: #fff !important;\n  background: rgba(0, 0, 0, .8);\n  -webkit-border-radius: 50%;\n  border-radius: 50%;\n  text-align: center;\n  font-size: .75em;\n  width: 1.67em;\n  height: 1.67em;\n  line-height: 1.67em;\n  font-family: \"Open Sans\", \"DejaVu Sans\", sans-serif;\n  font-style: normal;\n  font-weight: bold\n}\n\n.conum[data-value] * {\n  color: #fff !important\n}\n\n.conum[data-value] + b {\n  display: none\n}\n\n.conum[data-value]:after {\n  content: attr(data-value)\n}\n\npre .conum[data-value] {\n  position: relative;\n  top: -.125em\n}\n\nb.conum * {\n  color: inherit !important\n}\n\n.conum:not([data-value]):empty {\n  display: none\n}\n\n/* Callout list */\n.hdlist > table, .colist > table {\n  border: 0;\n  background: none\n}\n\n.hdlist > table > tbody > tr, .colist > table > tbody > tr {\n  background: none\n}\n\ntd.hdlist1, td.hdlist2 {\n  vertical-align: top;\n  padding: 0 .625em\n}\n\ntd.hdlist1 {\n  font-weight: bold;\n  padding-bottom: 1.25em\n}\n\n/* Disabled from Asciidoctor CSS because it caused callout list to go under the\n * source listing when .stretch is applied (see #335)\n * .literalblock+.colist,.listingblock+.colist{margin-top:-.5em} */\n.colist td:not([class]):first-child {\n  padding: .4em .75em 0;\n  line-height: 1;\n  vertical-align: top\n}\n\n.colist td:not([class]):first-child img {\n  max-width: none\n}\n\n.colist td:not([class]):last-child {\n  padding: .25em 0\n}\n\n/* Override Asciidoctor CSS that causes issues with reveal.js features */\n.reveal .hljs table {\n  border: 0\n}\n\n/* Callout list rows would have a bottom border with some reveal.js themes (see #335) */\n.reveal .colist > table th, .reveal .colist > table td {\n  border-bottom: 0\n}\n\n/* Fixes line height with Highlight.js source listing when linenums enabled (see #331) */\n.reveal .hljs table thead tr th, .reveal .hljs table tfoot tr th, .reveal .hljs table tbody tr td, .reveal .hljs table tr td, .reveal .hljs table tfoot tr td {\n  line-height: inherit\n}\n\n/* Columns layout */\n.columns .slide-content {\n  display: flex;\n}\n\n.columns.wrap .slide-content {\n  flex-wrap: wrap;\n}\n\n.columns.is-vcentered .slide-content {\n  align-items: center;\n}\n\n.columns .slide-content > .column {\n  display: block;\n  flex-basis: 0;\n  flex-grow: 1;\n  flex-shrink: 1;\n}\n\n.columns .slide-content > .column > * {\n  padding: .75rem;\n}\n\n/* See #353 */\n.columns.wrap .slide-content > .column {\n  flex-basis: auto;\n}\n\n.columns .slide-content > .column.is-full {\n  flex: none;\n  width: 100%;\n}\n\n.columns .slide-content > .column.is-four-fifths {\n  flex: none;\n  width: 80%;\n}\n\n.columns .slide-content > .column.is-three-quarters {\n  flex: none;\n  width: 75%;\n}\n\n.columns .slide-content > .column.is-two-thirds {\n  flex: none;\n  width: 66.6666%;\n}\n\n.columns .slide-content > .column.is-three-fifths {\n  flex: none;\n  width: 60%;\n}\n\n.columns .slide-content > .column.is-half {\n  flex: none;\n  width: 50%;\n}\n\n.columns .slide-content > .column.is-two-fifths {\n  flex: none;\n  width: 40%;\n}\n\n.columns .slide-content > .column.is-one-third {\n  flex: none;\n  width: 33.3333%;\n}\n\n.columns .slide-content > .column.is-one-quarter {\n  flex: none;\n  width: 25%;\n}\n\n.columns .slide-content > .column.is-one-fifth {\n  flex: none;\n  width: 20%;\n}\n\n.columns .slide-content > .column.has-text-left {\n  text-align: left;\n}\n\n.columns .slide-content > .column.has-text-justified {\n  text-align: justify;\n}\n\n.columns .slide-content > .column.has-text-right {\n  text-align: right;\n}\n\n.columns .slide-content > .column.has-text-left {\n  text-align: left;\n}\n\n.columns .slide-content > .column.has-text-justified {\n  text-align: justify;\n}\n\n.columns .slide-content > .column.has-text-right {\n  text-align: right;\n}\n\n.text-left {\n  text-align: left !important\n}\n\n.text-right {\n  text-align: right !important\n}\n\n.text-center {\n  text-align: center !important\n}\n\n.text-justify {\n  text-align: justify !important\n}\n\n.footnotes {\n  border-top: 1px solid rgba(0, 0, 0, 0.2);\n  padding: 0.5em 0 0 0;\n  font-size: 0.65em;\n  margin-top: 4em;\n}\n\n.byline {\n  font-size:.8em\n}\nul.byline {\n  list-style-type: none;\n}\nul.byline li + li {\n  margin-top: 0.25em;\n}\n</style>".freeze); 
+      ; _slim_codeattributes19 = (attr :revealjs_customtheme, %(#{revealjsdir}/dist/theme/#{attr 'revealjs_theme', 'black'}.css)); if _slim_codeattributes19; if _slim_codeattributes19 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes19); _buf << ("\""); end; end; _buf << (" id=\"theme\"><!--This CSS is generated by the Asciidoctor reveal.js converter to further integrate AsciiDoc's existing semantic with reveal.js--><style type=\"text/css\">.reveal div.right {\n  float: right\n}\n\n/* source blocks */\n.reveal .listingblock.stretch > .content {\n  height: 100%\n}\n\n.reveal .listingblock.stretch > .content > pre {\n  height: 100%\n}\n\n.reveal .listingblock.stretch > .content > pre > code {\n  height: 100%;\n  max-height: 100%\n}\n\n/* auto-animate feature */\n/* hide the scrollbar when auto-animating source blocks */\n.reveal pre[data-auto-animate-target] {\n  overflow: hidden;\n}\n\n.reveal pre[data-auto-animate-target] code {\n  overflow: hidden;\n}\n\n/* add a min width to avoid horizontal shift on line numbers */\ncode.hljs .hljs-ln-line.hljs-ln-n {\n  min-width: 1.25em;\n}\n\n/* tables */\ntable {\n  border-collapse: collapse;\n  border-spacing: 0\n}\n\ntable {\n  margin-bottom: 1.25em;\n  border: solid 1px #dedede\n}\n\ntable thead tr th, table thead tr td, table tfoot tr th, table tfoot tr td {\n  padding: .5em .625em .625em;\n  font-size: inherit;\n  text-align: left\n}\n\ntable tr th, table tr td {\n  padding: .5625em .625em;\n  font-size: inherit\n}\n\ntable thead tr th, table tfoot tr th, table tbody tr td, table tr td, table tfoot tr td {\n  display: table-cell;\n  line-height: 1.6\n}\n\ntd.tableblock > .content {\n  margin-bottom: 1.25em\n}\n\ntd.tableblock > .content > :last-child {\n  margin-bottom: -1.25em\n}\n\ntable.tableblock, th.tableblock, td.tableblock {\n  border: 0 solid #dedede\n}\n\ntable.grid-all > thead > tr > .tableblock, table.grid-all > tbody > tr > .tableblock {\n  border-width: 0 1px 1px 0\n}\n\ntable.grid-all > tfoot > tr > .tableblock {\n  border-width: 1px 1px 0 0\n}\n\ntable.grid-cols > * > tr > .tableblock {\n  border-width: 0 1px 0 0\n}\n\ntable.grid-rows > thead > tr > .tableblock, table.grid-rows > tbody > tr > .tableblock {\n  border-width: 0 0 1px\n}\n\ntable.grid-rows > tfoot > tr > .tableblock {\n  border-width: 1px 0 0\n}\n\ntable.grid-all > * > tr > .tableblock:last-child, table.grid-cols > * > tr > .tableblock:last-child {\n  border-right-width: 0\n}\n\ntable.grid-all > tbody > tr:last-child > .tableblock, table.grid-all > thead:last-child > tr > .tableblock, table.grid-rows > tbody > tr:last-child > .tableblock, table.grid-rows > thead:last-child > tr > .tableblock {\n  border-bottom-width: 0\n}\n\ntable.frame-all {\n  border-width: 1px\n}\n\ntable.frame-sides {\n  border-width: 0 1px\n}\n\ntable.frame-topbot, table.frame-ends {\n  border-width: 1px 0\n}\n\n.reveal table th.halign-left, .reveal table td.halign-left {\n  text-align: left\n}\n\n.reveal table th.halign-right, .reveal table td.halign-right {\n  text-align: right\n}\n\n.reveal table th.halign-center, .reveal table td.halign-center {\n  text-align: center\n}\n\n.reveal table th.valign-top, .reveal table td.valign-top {\n  vertical-align: top\n}\n\n.reveal table th.valign-bottom, .reveal table td.valign-bottom {\n  vertical-align: bottom\n}\n\n.reveal table th.valign-middle, .reveal table td.valign-middle {\n  vertical-align: middle\n}\n\ntable thead th, table tfoot th {\n  font-weight: bold\n}\n\ntbody tr th {\n  display: table-cell;\n  line-height: 1.6\n}\n\ntbody tr th, tbody tr th p, tfoot tr th, tfoot tr th p {\n  font-weight: bold\n}\n\nthead {\n  display: table-header-group\n}\n\n.reveal table.grid-none th, .reveal table.grid-none td {\n  border-bottom: 0 !important\n}\n\n/* kbd macro */\nkbd {\n  font-family: \"Droid Sans Mono\", \"DejaVu Sans Mono\", monospace;\n  display: inline-block;\n  color: rgba(0, 0, 0, .8);\n  font-size: .65em;\n  line-height: 1.45;\n  background: #f7f7f7;\n  border: 1px solid #ccc;\n  -webkit-border-radius: 3px;\n  border-radius: 3px;\n  -webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 0 0 .1em white inset;\n  box-shadow: 0 1px 0 rgba(0, 0, 0, .2), 0 0 0 .1em #fff inset;\n  margin: 0 .15em;\n  padding: .2em .5em;\n  vertical-align: middle;\n  position: relative;\n  top: -.1em;\n  white-space: nowrap\n}\n\n.keyseq kbd:first-child {\n  margin-left: 0\n}\n\n.keyseq kbd:last-child {\n  margin-right: 0\n}\n\n/* callouts */\n.conum[data-value] {\n  display: inline-block;\n  color: #fff !important;\n  background: rgba(0, 0, 0, .8);\n  -webkit-border-radius: 50%;\n  border-radius: 50%;\n  text-align: center;\n  font-size: .75em;\n  width: 1.67em;\n  height: 1.67em;\n  line-height: 1.67em;\n  font-family: \"Open Sans\", \"DejaVu Sans\", sans-serif;\n  font-style: normal;\n  font-weight: bold\n}\n\n.conum[data-value] * {\n  color: #fff !important\n}\n\n.conum[data-value] + b {\n  display: none\n}\n\n.conum[data-value]:after {\n  content: attr(data-value)\n}\n\npre .conum[data-value] {\n  position: relative;\n  top: -.125em\n}\n\nb.conum * {\n  color: inherit !important\n}\n\n.conum:not([data-value]):empty {\n  display: none\n}\n\n/* Callout list */\n.hdlist > table, .colist > table {\n  border: 0;\n  background: none\n}\n\n.hdlist > table > tbody > tr, .colist > table > tbody > tr {\n  background: none\n}\n\ntd.hdlist1, td.hdlist2 {\n  vertical-align: top;\n  padding: 0 .625em\n}\n\ntd.hdlist1 {\n  font-weight: bold;\n  padding-bottom: 1.25em\n}\n\n/* Disabled from Asciidoctor CSS because it caused callout list to go under the\n * source listing when .stretch is applied (see #335)\n * .literalblock+.colist,.listingblock+.colist{margin-top:-.5em} */\n.colist td:not([class]):first-child {\n  padding: .4em .75em 0;\n  line-height: 1;\n  vertical-align: top\n}\n\n.colist td:not([class]):first-child img {\n  max-width: none\n}\n\n.colist td:not([class]):last-child {\n  padding: .25em 0\n}\n\n/* Override Asciidoctor CSS that causes issues with reveal.js features */\n.reveal .hljs table {\n  border: 0\n}\n\n/* Callout list rows would have a bottom border with some reveal.js themes (see #335) */\n.reveal .colist > table th, .reveal .colist > table td {\n  border-bottom: 0\n}\n\n/* Fixes line height with Highlight.js source listing when linenums enabled (see #331) */\n.reveal .hljs table thead tr th, .reveal .hljs table tfoot tr th, .reveal .hljs table tbody tr td, .reveal .hljs table tr td, .reveal .hljs table tfoot tr td {\n  line-height: inherit\n}\n\n/* Columns layout */\n.columns .slide-content {\n  display: flex;\n}\n\n.columns.wrap .slide-content {\n  flex-wrap: wrap;\n}\n\n.columns.is-vcentered .slide-content {\n  align-items: center;\n}\n\n.columns .slide-content > .column {\n  display: block;\n  flex-basis: 0;\n  flex-grow: 1;\n  flex-shrink: 1;\n}\n\n.columns .slide-content > .column > * {\n  padding: .75rem;\n}\n\n/* See #353 */\n.columns.wrap .slide-content > .column {\n  flex-basis: auto;\n}\n\n.columns .slide-content > .column.is-full {\n  flex: none;\n  width: 100%;\n}\n\n.columns .slide-content > .column.is-four-fifths {\n  flex: none;\n  width: 80%;\n}\n\n.columns .slide-content > .column.is-three-quarters {\n  flex: none;\n  width: 75%;\n}\n\n.columns .slide-content > .column.is-two-thirds {\n  flex: none;\n  width: 66.6666%;\n}\n\n.columns .slide-content > .column.is-three-fifths {\n  flex: none;\n  width: 60%;\n}\n\n.columns .slide-content > .column.is-half {\n  flex: none;\n  width: 50%;\n}\n\n.columns .slide-content > .column.is-two-fifths {\n  flex: none;\n  width: 40%;\n}\n\n.columns .slide-content > .column.is-one-third {\n  flex: none;\n  width: 33.3333%;\n}\n\n.columns .slide-content > .column.is-one-quarter {\n  flex: none;\n  width: 25%;\n}\n\n.columns .slide-content > .column.is-one-fifth {\n  flex: none;\n  width: 20%;\n}\n\n.columns .slide-content > .column.has-text-left {\n  text-align: left;\n}\n\n.columns .slide-content > .column.has-text-justified {\n  text-align: justify;\n}\n\n.columns .slide-content > .column.has-text-right {\n  text-align: right;\n}\n\n.columns .slide-content > .column.has-text-left {\n  text-align: left;\n}\n\n.columns .slide-content > .column.has-text-justified {\n  text-align: justify;\n}\n\n.columns .slide-content > .column.has-text-right {\n  text-align: right;\n}\n\n.text-left {\n  text-align: left !important\n}\n\n.text-right {\n  text-align: right !important\n}\n\n.text-center {\n  text-align: center !important\n}\n\n.text-justify {\n  text-align: justify !important\n}\n\n.footnotes {\n  border-top: 1px solid rgba(0, 0, 0, 0.2);\n  padding: 0.5em 0 0 0;\n  font-size: 0.65em;\n  margin-top: 4em;\n}\n\n.byline {\n  font-size:.8em\n}\nul.byline {\n  list-style-type: none;\n}\nul.byline li + li {\n  margin-top: 0.25em;\n}\n</style>"); 
       ; 
       ; 
       ; 
@@ -726,28 +726,28 @@ def convert_document(node, opts = {})
       ; 
       ; if attr? 'iconfont-remote'; 
       ; if (iconfont_cdn = (attr 'iconfont-cdn')); 
-      ; _buf << ("<link rel=\"stylesheet\"".freeze); _slim_codeattributes20 = iconfont_cdn; if _slim_codeattributes20; if _slim_codeattributes20 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes20).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<link rel=\"stylesheet\""); _slim_codeattributes20 = iconfont_cdn; if _slim_codeattributes20; if _slim_codeattributes20 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes20); _buf << ("\""); end; end; _buf << (">"); 
       ; else; 
       ; 
       ; font_awesome_version = (attr 'font-awesome-version', '5.15.1'); 
-      ; _buf << ("<link rel=\"stylesheet\"".freeze); _slim_codeattributes21 = %(#{cdn_base}/font-awesome/#{font_awesome_version}/css/all.min.css); if _slim_codeattributes21; if _slim_codeattributes21 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes21).to_s); _buf << ("\"".freeze); end; end; _buf << ("><link rel=\"stylesheet\"".freeze); 
-      ; _slim_codeattributes22 = %(#{cdn_base}/font-awesome/#{font_awesome_version}/css/v4-shims.min.css); if _slim_codeattributes22; if _slim_codeattributes22 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes22).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<link rel=\"stylesheet\""); _slim_codeattributes21 = %(#{cdn_base}/font-awesome/#{font_awesome_version}/css/all.min.css); if _slim_codeattributes21; if _slim_codeattributes21 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes21); _buf << ("\""); end; end; _buf << ("><link rel=\"stylesheet\""); 
+      ; _slim_codeattributes22 = %(#{cdn_base}/font-awesome/#{font_awesome_version}/css/v4-shims.min.css); if _slim_codeattributes22; if _slim_codeattributes22 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes22); _buf << ("\""); end; end; _buf << (">"); 
       ; end; else; 
-      ; _buf << ("<link rel=\"stylesheet\"".freeze); _slim_codeattributes23 = (normalize_web_path %(#{attr 'iconfont-name', 'font-awesome'}.css), (attr 'stylesdir', ''), false); if _slim_codeattributes23; if _slim_codeattributes23 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes23).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
-      ; end; end; _buf << ((generate_stem(cdn_base)).to_s); 
+      ; _buf << ("<link rel=\"stylesheet\""); _slim_codeattributes23 = (normalize_web_path %(#{attr 'iconfont-name', 'font-awesome'}.css), (attr 'stylesdir', ''), false); if _slim_codeattributes23; if _slim_codeattributes23 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes23); _buf << ("\""); end; end; _buf << (">"); 
+      ; end; end; _buf << (generate_stem(cdn_base)); 
       ; syntax_hl = self.syntax_highlighter; 
       ; if syntax_hl && (syntax_hl.docinfo? :head); 
-      ; _buf << ((syntax_hl.docinfo :head, self, cdn_base_url: cdn_base, linkcss: linkcss, self_closing_tag_slash: '/').to_s); 
+      ; _buf << (syntax_hl.docinfo :head, self, cdn_base_url: cdn_base, linkcss: linkcss, self_closing_tag_slash: '/'); 
       ; end; if attr? :customcss; 
-      ; _buf << ("<link rel=\"stylesheet\"".freeze); _slim_codeattributes24 = ((customcss = attr :customcss).empty? ? 'asciidoctor-revealjs.css' : customcss); if _slim_codeattributes24; if _slim_codeattributes24 == true; _buf << (" href".freeze); else; _buf << (" href=\"".freeze); _buf << ((_slim_codeattributes24).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<link rel=\"stylesheet\""); _slim_codeattributes24 = ((customcss = attr :customcss).empty? ? 'asciidoctor-revealjs.css' : customcss); if _slim_codeattributes24; if _slim_codeattributes24 == true; _buf << (" href"); else; _buf << (" href=\""); _buf << (_slim_codeattributes24); _buf << ("\""); end; end; _buf << (">"); 
       ; end; unless (_docinfo = docinfo :head, '-revealjs.html').empty?; 
-      ; _buf << ((_docinfo).to_s); 
-      ; end; _buf << ("</head><body><div class=\"reveal\"><div class=\"slides\">".freeze); 
+      ; _buf << (_docinfo); 
+      ; end; _buf << ("</head><body><div class=\"reveal\"><div class=\"slides\">"); 
       ; 
       ; 
       ; 
       ; yield_content :slides; 
-      ; _buf << ("</div></div><script src=\"".freeze); _buf << ((revealjsdir).to_s); _buf << ("/dist/reveal.js\"></script><script>Array.prototype.slice.call(document.querySelectorAll('.slides section')).forEach(function(slide) {\n  if (slide.getAttribute('data-background-color')) return;\n  // user needs to explicitly say he wants CSS color to override otherwise we might break custom css or theme (#226)\n  if (!(slide.classList.contains('canvas') || slide.classList.contains('background'))) return;\n  var bgColor = getComputedStyle(slide).backgroundColor;\n  if (bgColor !== 'rgba(0, 0, 0, 0)' && bgColor !== 'transparent') {\n    slide.setAttribute('data-background-color', bgColor);\n    slide.style.backgroundColor = 'transparent';\n  }\n});\n\n// More info about config & dependencies:\n// - https://github.com/hakimel/reveal.js#configuration\n// - https://github.com/hakimel/reveal.js#dependencies\nReveal.initialize({\n  // Display presentation control arrows\n  controls: ".freeze); 
+      ; _buf << ("</div></div><script src=\""); _buf << (revealjsdir); _buf << ("/dist/reveal.js\"></script><script>Array.prototype.slice.call(document.querySelectorAll('.slides section')).forEach(function(slide) {\n  if (slide.getAttribute('data-background-color')) return;\n  // user needs to explicitly say he wants CSS color to override otherwise we might break custom css or theme (#226)\n  if (!(slide.classList.contains('canvas') || slide.classList.contains('background'))) return;\n  var bgColor = getComputedStyle(slide).backgroundColor;\n  if (bgColor !== 'rgba(0, 0, 0, 0)' && bgColor !== 'transparent') {\n    slide.setAttribute('data-background-color', bgColor);\n    slide.style.backgroundColor = 'transparent';\n  }\n});\n\n// More info about config & dependencies:\n// - https://github.com/hakimel/reveal.js#configuration\n// - https://github.com/hakimel/reveal.js#dependencies\nReveal.initialize({\n  // Display presentation control arrows\n  controls: "); 
       ; 
       ; 
       ; 
@@ -766,150 +766,150 @@ def convert_document(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_controls', true)).to_s); _buf << (",\n  // Help the user learn the controls by providing hints, for example by\n  // bouncing the down arrow when they first encounter a vertical slide\n  controlsTutorial: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_controls', true)); _buf << (",\n  // Help the user learn the controls by providing hints, for example by\n  // bouncing the down arrow when they first encounter a vertical slide\n  controlsTutorial: "); 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_controlstutorial', true)).to_s); _buf << (",\n  // Determines where controls appear, \"edges\" or \"bottom-right\"\n  controlsLayout: '".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_controlstutorial', true)); _buf << (",\n  // Determines where controls appear, \"edges\" or \"bottom-right\"\n  controlsLayout: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_controlslayout', 'bottom-right').to_s); _buf << ("',\n  // Visibility rule for backwards navigation arrows; \"faded\", \"hidden\"\n  // or \"visible\"\n  controlsBackArrows: '".freeze); 
+      ; _buf << (attr 'revealjs_controlslayout', 'bottom-right'); _buf << ("',\n  // Visibility rule for backwards navigation arrows; \"faded\", \"hidden\"\n  // or \"visible\"\n  controlsBackArrows: '"); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_controlsbackarrows', 'faded').to_s); _buf << ("',\n  // Display a presentation progress bar\n  progress: ".freeze); 
+      ; _buf << (attr 'revealjs_controlsbackarrows', 'faded'); _buf << ("',\n  // Display a presentation progress bar\n  progress: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_progress', true)).to_s); _buf << (",\n  // Display the page number of the current slide\n  slideNumber: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_progress', true)); _buf << (",\n  // Display the page number of the current slide\n  slideNumber: "); 
       ; 
-      ; _buf << ((to_valid_slidenumber(attr 'revealjs_slidenumber', false)).to_s); _buf << (",\n  // Control which views the slide number displays on\n  showSlideNumber: '".freeze); 
+      ; _buf << (to_valid_slidenumber(attr 'revealjs_slidenumber', false)); _buf << (",\n  // Control which views the slide number displays on\n  showSlideNumber: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_showslidenumber', 'all').to_s); _buf << ("',\n  // Add the current slide number to the URL hash so that reloading the\n  // page/copying the URL will return you to the same slide\n  hash: ".freeze); 
+      ; _buf << (attr 'revealjs_showslidenumber', 'all'); _buf << ("',\n  // Add the current slide number to the URL hash so that reloading the\n  // page/copying the URL will return you to the same slide\n  hash: "); 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_hash', false)).to_s); _buf << (",\n  // Push each slide change to the browser history. Implies `hash: true`\n  history: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_hash', false)); _buf << (",\n  // Push each slide change to the browser history. Implies `hash: true`\n  history: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_history', false)).to_s); _buf << (",\n  // Enable keyboard shortcuts for navigation\n  keyboard: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_history', false)); _buf << (",\n  // Enable keyboard shortcuts for navigation\n  keyboard: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_keyboard', true)).to_s); _buf << (",\n  // Enable the slide overview mode\n  overview: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_keyboard', true)); _buf << (",\n  // Enable the slide overview mode\n  overview: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_overview', true)).to_s); _buf << (",\n  // Disables the default reveal.js slide layout so that you can use custom CSS layout\n  disableLayout: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_overview', true)); _buf << (",\n  // Disables the default reveal.js slide layout so that you can use custom CSS layout\n  disableLayout: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_disablelayout', false)).to_s); _buf << (",\n  // Vertical centering of slides\n  center: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_disablelayout', false)); _buf << (",\n  // Vertical centering of slides\n  center: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_center', true)).to_s); _buf << (",\n  // Enables touch navigation on devices with touch input\n  touch: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_center', true)); _buf << (",\n  // Enables touch navigation on devices with touch input\n  touch: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_touch', true)).to_s); _buf << (",\n  // Loop the presentation\n  loop: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_touch', true)); _buf << (",\n  // Loop the presentation\n  loop: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_loop', false)).to_s); _buf << (",\n  // Change the presentation direction to be RTL\n  rtl: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_loop', false)); _buf << (",\n  // Change the presentation direction to be RTL\n  rtl: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_rtl', false)).to_s); _buf << (",\n  // See https://github.com/hakimel/reveal.js/#navigation-mode\n  navigationMode: '".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_rtl', false)); _buf << (",\n  // See https://github.com/hakimel/reveal.js/#navigation-mode\n  navigationMode: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_navigationmode', 'default').to_s); _buf << ("',\n  // Randomizes the order of slides each time the presentation loads\n  shuffle: ".freeze); 
+      ; _buf << (attr 'revealjs_navigationmode', 'default'); _buf << ("',\n  // Randomizes the order of slides each time the presentation loads\n  shuffle: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_shuffle', false)).to_s); _buf << (",\n  // Turns fragments on and off globally\n  fragments: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_shuffle', false)); _buf << (",\n  // Turns fragments on and off globally\n  fragments: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_fragments', true)).to_s); _buf << (",\n  // Flags whether to include the current fragment in the URL,\n  // so that reloading brings you to the same fragment position\n  fragmentInURL: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_fragments', true)); _buf << (",\n  // Flags whether to include the current fragment in the URL,\n  // so that reloading brings you to the same fragment position\n  fragmentInURL: "); 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_fragmentinurl', false)).to_s); _buf << (",\n  // Flags if the presentation is running in an embedded mode,\n  // i.e. contained within a limited portion of the screen\n  embedded: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_fragmentinurl', false)); _buf << (",\n  // Flags if the presentation is running in an embedded mode,\n  // i.e. contained within a limited portion of the screen\n  embedded: "); 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_embedded', false)).to_s); _buf << (",\n  // Flags if we should show a help overlay when the questionmark\n  // key is pressed\n  help: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_embedded', false)); _buf << (",\n  // Flags if we should show a help overlay when the questionmark\n  // key is pressed\n  help: "); 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_help', true)).to_s); _buf << (",\n  // Flags if speaker notes should be visible to all viewers\n  showNotes: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_help', true)); _buf << (",\n  // Flags if speaker notes should be visible to all viewers\n  showNotes: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_shownotes', false)).to_s); _buf << (",\n  // Global override for autolaying embedded media (video/audio/iframe)\n  // - null: Media will only autoplay if data-autoplay is present\n  // - true: All media will autoplay, regardless of individual setting\n  // - false: No media will autoplay, regardless of individual setting\n  autoPlayMedia: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_shownotes', false)); _buf << (",\n  // Global override for autolaying embedded media (video/audio/iframe)\n  // - null: Media will only autoplay if data-autoplay is present\n  // - true: All media will autoplay, regardless of individual setting\n  // - false: No media will autoplay, regardless of individual setting\n  autoPlayMedia: "); 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_autoplaymedia', 'null').to_s); _buf << (",\n  // Global override for preloading lazy-loaded iframes\n  // - null: Iframes with data-src AND data-preload will be loaded when within\n  //   the viewDistance, iframes with only data-src will be loaded when visible\n  // - true: All iframes with data-src will be loaded when within the viewDistance\n  // - false: All iframes with data-src will be loaded only when visible\n  preloadIframes: ".freeze); 
+      ; _buf << (attr 'revealjs_autoplaymedia', 'null'); _buf << (",\n  // Global override for preloading lazy-loaded iframes\n  // - null: Iframes with data-src AND data-preload will be loaded when within\n  //   the viewDistance, iframes with only data-src will be loaded when visible\n  // - true: All iframes with data-src will be loaded when within the viewDistance\n  // - false: All iframes with data-src will be loaded only when visible\n  preloadIframes: "); 
       ; 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_preloadiframes', 'null').to_s); _buf << (",\n  // Number of milliseconds between automatically proceeding to the\n  // next slide, disabled when set to 0, this value can be overwritten\n  // by using a data-autoslide attribute on your slides\n  autoSlide: ".freeze); 
+      ; _buf << (attr 'revealjs_preloadiframes', 'null'); _buf << (",\n  // Number of milliseconds between automatically proceeding to the\n  // next slide, disabled when set to 0, this value can be overwritten\n  // by using a data-autoslide attribute on your slides\n  autoSlide: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_autoslide', 0).to_s); _buf << (",\n  // Stop auto-sliding after user input\n  autoSlideStoppable: ".freeze); 
+      ; _buf << (attr 'revealjs_autoslide', 0); _buf << (",\n  // Stop auto-sliding after user input\n  autoSlideStoppable: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_autoslidestoppable', true)).to_s); _buf << (",\n  // Use this method for navigation when auto-sliding\n  autoSlideMethod: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_autoslidestoppable', true)); _buf << (",\n  // Use this method for navigation when auto-sliding\n  autoSlideMethod: "); 
       ; 
-      ; _buf << ((attr 'revealjs_autoslidemethod', 'Reveal.navigateNext').to_s); _buf << (",\n  // Specify the average time in seconds that you think you will spend\n  // presenting each slide. This is used to show a pacing timer in the\n  // speaker view\n  defaultTiming: ".freeze); 
+      ; _buf << (attr 'revealjs_autoslidemethod', 'Reveal.navigateNext'); _buf << (",\n  // Specify the average time in seconds that you think you will spend\n  // presenting each slide. This is used to show a pacing timer in the\n  // speaker view\n  defaultTiming: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_defaulttiming', 120).to_s); _buf << (",\n  // Specify the total time in seconds that is available to\n  // present.  If this is set to a nonzero value, the pacing\n  // timer will work out the time available for each slide,\n  // instead of using the defaultTiming value\n  totalTime: ".freeze); 
+      ; _buf << (attr 'revealjs_defaulttiming', 120); _buf << (",\n  // Specify the total time in seconds that is available to\n  // present.  If this is set to a nonzero value, the pacing\n  // timer will work out the time available for each slide,\n  // instead of using the defaultTiming value\n  totalTime: "); 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_totaltime', 0).to_s); _buf << (",\n  // Specify the minimum amount of time you want to allot to\n  // each slide, if using the totalTime calculation method.  If\n  // the automated time allocation causes slide pacing to fall\n  // below this threshold, then you will see an alert in the\n  // speaker notes window\n  minimumTimePerSlide: ".freeze); 
+      ; _buf << (attr 'revealjs_totaltime', 0); _buf << (",\n  // Specify the minimum amount of time you want to allot to\n  // each slide, if using the totalTime calculation method.  If\n  // the automated time allocation causes slide pacing to fall\n  // below this threshold, then you will see an alert in the\n  // speaker notes window\n  minimumTimePerSlide: "); 
       ; 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_minimumtimeperslide', 0).to_s); _buf << (",\n  // Enable slide navigation via mouse wheel\n  mouseWheel: ".freeze); 
+      ; _buf << (attr 'revealjs_minimumtimeperslide', 0); _buf << (",\n  // Enable slide navigation via mouse wheel\n  mouseWheel: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_mousewheel', false)).to_s); _buf << (",\n  // Hide cursor if inactive\n  hideInactiveCursor: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_mousewheel', false)); _buf << (",\n  // Hide cursor if inactive\n  hideInactiveCursor: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_hideinactivecursor', true)).to_s); _buf << (",\n  // Time before the cursor is hidden (in ms)\n  hideCursorTime: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_hideinactivecursor', true)); _buf << (",\n  // Time before the cursor is hidden (in ms)\n  hideCursorTime: "); 
       ; 
-      ; _buf << ((attr 'revealjs_hidecursortime', 5000).to_s); _buf << (",\n  // Hides the address bar on mobile devices\n  hideAddressBar: ".freeze); 
+      ; _buf << (attr 'revealjs_hidecursortime', 5000); _buf << (",\n  // Hides the address bar on mobile devices\n  hideAddressBar: "); 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_hideaddressbar', true)).to_s); _buf << (",\n  // Opens links in an iframe preview overlay\n  // Add `data-preview-link` and `data-preview-link=\"false\"` to customise each link\n  // individually\n  previewLinks: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_hideaddressbar', true)); _buf << (",\n  // Opens links in an iframe preview overlay\n  // Add `data-preview-link` and `data-preview-link=\"false\"` to customise each link\n  // individually\n  previewLinks: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_previewlinks', false)).to_s); _buf << (",\n  // Transition style (e.g., none, fade, slide, convex, concave, zoom)\n  transition: '".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_previewlinks', false)); _buf << (",\n  // Transition style (e.g., none, fade, slide, convex, concave, zoom)\n  transition: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_transition', 'slide').to_s); _buf << ("',\n  // Transition speed (e.g., default, fast, slow)\n  transitionSpeed: '".freeze); 
+      ; _buf << (attr 'revealjs_transition', 'slide'); _buf << ("',\n  // Transition speed (e.g., default, fast, slow)\n  transitionSpeed: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_transitionspeed', 'default').to_s); _buf << ("',\n  // Transition style for full page slide backgrounds (e.g., none, fade, slide, convex, concave, zoom)\n  backgroundTransition: '".freeze); 
+      ; _buf << (attr 'revealjs_transitionspeed', 'default'); _buf << ("',\n  // Transition style for full page slide backgrounds (e.g., none, fade, slide, convex, concave, zoom)\n  backgroundTransition: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_backgroundtransition', 'fade').to_s); _buf << ("',\n  // Number of slides away from the current that are visible\n  viewDistance: ".freeze); 
+      ; _buf << (attr 'revealjs_backgroundtransition', 'fade'); _buf << ("',\n  // Number of slides away from the current that are visible\n  viewDistance: "); 
       ; 
-      ; _buf << ((attr 'revealjs_viewdistance', 3).to_s); _buf << (",\n  // Number of slides away from the current that are visible on mobile\n  // devices. It is advisable to set this to a lower number than\n  // viewDistance in order to save resources.\n  mobileViewDistance: ".freeze); 
+      ; _buf << (attr 'revealjs_viewdistance', 3); _buf << (",\n  // Number of slides away from the current that are visible on mobile\n  // devices. It is advisable to set this to a lower number than\n  // viewDistance in order to save resources.\n  mobileViewDistance: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_mobileviewdistance', 3).to_s); _buf << (",\n  // Parallax background image (e.g., \"'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg'\")\n  parallaxBackgroundImage: '".freeze); 
+      ; _buf << (attr 'revealjs_mobileviewdistance', 3); _buf << (",\n  // Parallax background image (e.g., \"'https://s3.amazonaws.com/hakim-static/reveal-js/reveal-parallax-1.jpg'\")\n  parallaxBackgroundImage: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_parallaxbackgroundimage', '').to_s); _buf << ("',\n  // Parallax background size in CSS syntax (e.g., \"2100px 900px\")\n  parallaxBackgroundSize: '".freeze); 
+      ; _buf << (attr 'revealjs_parallaxbackgroundimage', ''); _buf << ("',\n  // Parallax background size in CSS syntax (e.g., \"2100px 900px\")\n  parallaxBackgroundSize: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_parallaxbackgroundsize', '').to_s); _buf << ("',\n  // Number of pixels to move the parallax background per slide\n  // - Calculated automatically unless specified\n  // - Set to 0 to disable movement along an axis\n  parallaxBackgroundHorizontal: ".freeze); 
+      ; _buf << (attr 'revealjs_parallaxbackgroundsize', ''); _buf << ("',\n  // Number of pixels to move the parallax background per slide\n  // - Calculated automatically unless specified\n  // - Set to 0 to disable movement along an axis\n  parallaxBackgroundHorizontal: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_parallaxbackgroundhorizontal', 'null').to_s); _buf << (",\n  parallaxBackgroundVertical: ".freeze); 
-      ; _buf << ((attr 'revealjs_parallaxbackgroundvertical', 'null').to_s); _buf << (",\n  // The display mode that will be used to show slides\n  display: '".freeze); 
+      ; _buf << (attr 'revealjs_parallaxbackgroundhorizontal', 'null'); _buf << (",\n  parallaxBackgroundVertical: "); 
+      ; _buf << (attr 'revealjs_parallaxbackgroundvertical', 'null'); _buf << (",\n  // The display mode that will be used to show slides\n  display: '"); 
       ; 
-      ; _buf << ((attr 'revealjs_display', 'block').to_s); _buf << ("',\n\n  // The \"normal\" size of the presentation, aspect ratio will be preserved\n  // when the presentation is scaled to fit different resolutions. Can be\n  // specified using percentage units.\n  width: ".freeze); 
+      ; _buf << (attr 'revealjs_display', 'block'); _buf << ("',\n\n  // The \"normal\" size of the presentation, aspect ratio will be preserved\n  // when the presentation is scaled to fit different resolutions. Can be\n  // specified using percentage units.\n  width: "); 
       ; 
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (",\n  height: ".freeze); 
-      ; _buf << ((attr 'revealjs_height', 700).to_s); _buf << (",\n\n  // Factor of the display size that should remain empty around the content\n  margin: ".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (",\n  height: "); 
+      ; _buf << (attr 'revealjs_height', 700); _buf << (",\n\n  // Factor of the display size that should remain empty around the content\n  margin: "); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_margin', 0.1).to_s); _buf << (",\n\n  // Bounds for smallest/largest possible scale to apply to content\n  minScale: ".freeze); 
+      ; _buf << (attr 'revealjs_margin', 0.1); _buf << (",\n\n  // Bounds for smallest/largest possible scale to apply to content\n  minScale: "); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_minscale', 0.2).to_s); _buf << (",\n  maxScale: ".freeze); 
-      ; _buf << ((attr 'revealjs_maxscale', 1.5).to_s); _buf << (",\n\n  // PDF Export Options\n  // Put each fragment on a separate page\n  pdfSeparateFragments: ".freeze); 
+      ; _buf << (attr 'revealjs_minscale', 0.2); _buf << (",\n  maxScale: "); 
+      ; _buf << (attr 'revealjs_maxscale', 1.5); _buf << (",\n\n  // PDF Export Options\n  // Put each fragment on a separate page\n  pdfSeparateFragments: "); 
       ; 
       ; 
       ; 
-      ; _buf << ((to_boolean(attr 'revealjs_pdfseparatefragments', true)).to_s); _buf << (",\n  // For slides that do not fit on a page, max number of pages\n  pdfMaxPagesPerSlide: ".freeze); 
+      ; _buf << (to_boolean(attr 'revealjs_pdfseparatefragments', true)); _buf << (",\n  // For slides that do not fit on a page, max number of pages\n  pdfMaxPagesPerSlide: "); 
       ; 
-      ; _buf << ((attr 'revealjs_pdfmaxpagesperslide', 1).to_s); _buf << (",\n\n  // Optional libraries used to extend on reveal.js\n  dependencies: [\n      ".freeze); 
+      ; _buf << (attr 'revealjs_pdfmaxpagesperslide', 1); _buf << (",\n\n  // Optional libraries used to extend on reveal.js\n  dependencies: [\n      "); 
       ; 
       ; 
       ; 
-      ; _buf << ((revealjs_dependencies(document, self, revealjsdir)).to_s); 
-      ; _buf << ("\n  ],\n});</script><script>var dom = {};\ndom.slides = document.querySelector('.reveal .slides');\n\nfunction getRemainingHeight(element, slideElement, height) {\n  height = height || 0;\n  if (element) {\n    var newHeight, oldHeight = element.style.height;\n    // Change the .stretch element height to 0 in order find the height of all\n    // the other elements\n    element.style.height = '0px';\n    // In Overview mode, the parent (.slide) height is set of 700px.\n    // Restore it temporarily to its natural height.\n    slideElement.style.height = 'auto';\n    newHeight = height - slideElement.offsetHeight;\n    // Restore the old height, just in case\n    element.style.height = oldHeight + 'px';\n    // Clear the parent (.slide) height. .removeProperty works in IE9+\n    slideElement.style.removeProperty('height');\n    return newHeight;\n  }\n  return height;\n}\n\nfunction layoutSlideContents(width, height) {\n  // Handle sizing of elements with the 'stretch' class\n  toArray(dom.slides.querySelectorAll('section .stretch')).forEach(function (element) {\n    // Determine how much vertical space we can use\n    var limit = 5; // hard limit\n    var parent = element.parentNode;\n    while (parent.nodeName !== 'SECTION' && limit > 0) {\n      parent = parent.parentNode;\n      limit--;\n    }\n    if (limit === 0) {\n      // unable to find parent, aborting!\n      return;\n    }\n    var remainingHeight = getRemainingHeight(element, parent, height);\n    // Consider the aspect ratio of media elements\n    if (/(img|video)/gi.test(element.nodeName)) {\n      var nw = element.naturalWidth || element.videoWidth, nh = element.naturalHeight || element.videoHeight;\n      var es = Math.min(width / nw, remainingHeight / nh);\n      element.style.width = (nw * es) + 'px';\n      element.style.height = (nh * es) + 'px';\n    } else {\n      element.style.width = width + 'px';\n      element.style.height = remainingHeight + 'px';\n    }\n  });\n}\n\nfunction toArray(o) {\n  return Array.prototype.slice.call(o);\n}\n\nReveal.addEventListener('slidechanged', function () {\n  layoutSlideContents(".freeze); 
+      ; _buf << (revealjs_dependencies(document, self, revealjsdir)); 
+      ; _buf << ("\n  ],\n});</script><script>var dom = {};\ndom.slides = document.querySelector('.reveal .slides');\n\nfunction getRemainingHeight(element, slideElement, height) {\n  height = height || 0;\n  if (element) {\n    var newHeight, oldHeight = element.style.height;\n    // Change the .stretch element height to 0 in order find the height of all\n    // the other elements\n    element.style.height = '0px';\n    // In Overview mode, the parent (.slide) height is set of 700px.\n    // Restore it temporarily to its natural height.\n    slideElement.style.height = 'auto';\n    newHeight = height - slideElement.offsetHeight;\n    // Restore the old height, just in case\n    element.style.height = oldHeight + 'px';\n    // Clear the parent (.slide) height. .removeProperty works in IE9+\n    slideElement.style.removeProperty('height');\n    return newHeight;\n  }\n  return height;\n}\n\nfunction layoutSlideContents(width, height) {\n  // Handle sizing of elements with the 'stretch' class\n  toArray(dom.slides.querySelectorAll('section .stretch')).forEach(function (element) {\n    // Determine how much vertical space we can use\n    var limit = 5; // hard limit\n    var parent = element.parentNode;\n    while (parent.nodeName !== 'SECTION' && limit > 0) {\n      parent = parent.parentNode;\n      limit--;\n    }\n    if (limit === 0) {\n      // unable to find parent, aborting!\n      return;\n    }\n    var remainingHeight = getRemainingHeight(element, parent, height);\n    // Consider the aspect ratio of media elements\n    if (/(img|video)/gi.test(element.nodeName)) {\n      var nw = element.naturalWidth || element.videoWidth, nh = element.naturalHeight || element.videoHeight;\n      var es = Math.min(width / nw, remainingHeight / nh);\n      element.style.width = (nw * es) + 'px';\n      element.style.height = (nh * es) + 'px';\n    } else {\n      element.style.width = width + 'px';\n      element.style.height = remainingHeight + 'px';\n    }\n  });\n}\n\nfunction toArray(o) {\n  return Array.prototype.slice.call(o);\n}\n\nReveal.addEventListener('slidechanged', function () {\n  layoutSlideContents("); 
       ; 
       ; 
       ; 
@@ -972,21 +972,21 @@ def convert_document(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});\nReveal.addEventListener('ready', function () {\n  layoutSlideContents(".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});\nReveal.addEventListener('ready', function () {\n  layoutSlideContents("); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});\nReveal.addEventListener('resize', function () {\n  layoutSlideContents(".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});\nReveal.addEventListener('resize', function () {\n  layoutSlideContents("); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});</script>".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});</script>"); 
       ; 
       ; 
       ; if syntax_hl && (syntax_hl.docinfo? :footer); 
-      ; _buf << ((syntax_hl.docinfo :footer, self, cdn_base_url: cdn_base, linkcss: linkcss, self_closing_tag_slash: '/').to_s); 
+      ; _buf << (syntax_hl.docinfo :footer, self, cdn_base_url: cdn_base, linkcss: linkcss, self_closing_tag_slash: '/'); 
       ; 
       ; end; unless (docinfo_content = (docinfo :footer, '.html')).empty?; 
-      ; _buf << ((docinfo_content).to_s); 
-      ; end; _buf << ("</body></html>".freeze); _buf
+      ; _buf << (docinfo_content); 
+      ; end; _buf << ("</body></html>"); _buf = _buf.join("")
     end
   end
 
@@ -994,16 +994,16 @@ def convert_embedded(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; unless notitle || !has_header?; 
-      ; _buf << ("<h1".freeze); _slim_codeattributes1 = @id; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id".freeze); else; _buf << (" id=\"".freeze); _buf << ((_slim_codeattributes1).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); _buf << ((@header.title).to_s); 
-      ; _buf << ("</h1>".freeze); end; _buf << ((content).to_s); 
+      _buf = []; unless notitle || !has_header?; 
+      ; _buf << ("<h1"); _slim_codeattributes1 = @id; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id"); else; _buf << (" id=\""); _buf << (_slim_codeattributes1); _buf << ("\""); end; end; _buf << (">"); _buf << (@header.title); 
+      ; _buf << ("</h1>"); end; _buf << (content); 
       ; unless !footnotes? || attr?(:nofootnotes); 
-      ; _buf << ("<div id=\"footnotes\"><hr>".freeze); 
+      ; _buf << ("<div id=\"footnotes\"><hr>"); 
       ; 
       ; footnotes.each do |fn|; 
-      ; _buf << ("<div class=\"footnote\" id=\"_footnote_".freeze); _buf << ((fn.index).to_s); _buf << ("\"><a href=\"#_footnoteref_".freeze); 
-      ; _buf << ((fn.index).to_s); _buf << ("\">".freeze); _buf << ((fn.index).to_s); _buf << ("</a>. ".freeze); _buf << ((fn.text).to_s); 
-      ; _buf << ("</div>".freeze); end; _buf << ("</div>".freeze); end; _buf
+      ; _buf << ("<div class=\"footnote\" id=\"_footnote_"); _buf << (fn.index); _buf << ("\"><a href=\"#_footnoteref_"); 
+      ; _buf << (fn.index); _buf << ("\">"); _buf << (fn.index); _buf << ("</a>. "); _buf << (fn.text); 
+      ; _buf << ("</div>"); end; _buf << ("</div>"); end; _buf = _buf.join("")
     end
   end
 
@@ -1011,11 +1011,11 @@ def convert_example(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['exampleblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['exampleblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((captioned_title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<div class=\"content\">".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (captioned_title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<div class=\"content\">"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</div>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1023,9 +1023,9 @@ def convert_floating_title(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_htag_filter1 = ((level + 1)).to_s; _buf << ("<h".freeze); _buf << ((_slim_htag_filter1).to_s); _slim_codeattributes1 = id; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id".freeze); else; _buf << (" id=\"".freeze); _buf << ((_slim_codeattributes1).to_s); _buf << ("\"".freeze); end; end; _temple_html_attributeremover1 = ''; _slim_codeattributes2 = [style, role]; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes2.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes2).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _buf << (" class=\"".freeze); _buf << ((_temple_html_attributeremover1).to_s); _buf << ("\"".freeze); end; _buf << (">".freeze); 
-      ; _buf << ((title).to_s); 
-      ; _buf << ("</h".freeze); _buf << ((_slim_htag_filter1).to_s); _buf << (">".freeze); _buf
+      _buf = []; _slim_htag_filter1 = ((level + 1)).to_s; _buf << ("<h"); _buf << (_slim_htag_filter1); _slim_codeattributes1 = id; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id"); else; _buf << (" id=\""); _buf << (_slim_codeattributes1); _buf << ("\""); end; end; _temple_html_attributeremover1 = []; _slim_codeattributes2 = [style, role]; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes2.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes2); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _buf << (" class=\""); _buf << (_temple_html_attributeremover1); _buf << ("\""); end; _buf << (">"); 
+      ; _buf << (title); 
+      ; _buf << ("</h"); _buf << (_slim_htag_filter1); _buf << (">"); _buf = _buf.join("")
     end
   end
 
@@ -1033,13 +1033,13 @@ def convert_image(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; unless attributes[1] == 'background' || attributes[1] == 'canvas'; 
+      _buf = []; unless attributes[1] == 'background' || attributes[1] == 'canvas'; 
       ; inline_style = [("text-align: #{attr :align}" if attr? :align),("float: #{attr :float}" if attr? :float)].compact.join('; '); 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['imageblock', role, ('fragment' if (option? :step) || (attr? 'step'))], :style => inline_style }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ((convert_image).to_s); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); if title?; 
-      ; _buf << ("<div class=\"title\">".freeze); _buf << ((captioned_title).to_s); 
-      ; _buf << ("</div>".freeze); end; end; _buf
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['imageblock', role, ('fragment' if (option? :step) || (attr? 'step'))], :style => inline_style }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << (convert_image); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); if title?; 
+      ; _buf << ("<div class=\"title\">"); _buf << (captioned_title); 
+      ; _buf << ("</div>"); end; end; _buf = _buf.join("")
     end
   end
 
@@ -1047,20 +1047,20 @@ def convert_inline_anchor(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; case @type; 
+      _buf = []; case @type; 
       ; when :xref; 
       ; refid = (attr :refid) || @target; 
-      ; _slim_controls1 = html_tag('a', { :href => @target, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << (((@text || @document.references[:ids].fetch(refid, "[#{refid}]")).tr_s("\n", ' ')).to_s); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); when :ref; 
-      ; _buf << ((html_tag('a', { :id => @target }.merge(data_attrs(@attributes)))).to_s); 
+      ; _slim_controls1 = html_tag('a', { :href => @target, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << ((@text || @document.references[:ids].fetch(refid, "[#{refid}]")).tr_s("\n", ' ')); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); when :ref; 
+      ; _buf << (html_tag('a', { :id => @target }.merge(data_attrs(@attributes)))); 
       ; when :bibref; 
-      ; _buf << ((html_tag('a', { :id => @target }.merge(data_attrs(@attributes)))).to_s); 
-      ; _buf << ("[".freeze); _buf << ((@target).to_s); _buf << ("]".freeze); 
+      ; _buf << (html_tag('a', { :id => @target }.merge(data_attrs(@attributes)))); 
+      ; _buf << ("["); _buf << (@target); _buf << ("]"); 
       ; else; 
-      ; _slim_controls3 = html_tag('a', { :href => @target, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact, :target => (attr :window), 'data-preview-link' => (bool_data_attr :preview) }.merge(data_attrs(@attributes))) do; _slim_controls4 = ''; 
-      ; _slim_controls4 << ((@text).to_s); 
-      ; _slim_controls4; end; _buf << ((_slim_controls3).to_s); end; _buf
+      ; _slim_controls3 = html_tag('a', { :href => @target, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact, :target => (attr :window), 'data-preview-link' => (bool_data_attr :preview) }.merge(data_attrs(@attributes))) do; _slim_controls4 = []; 
+      ; _slim_controls4 << (@text); 
+      ; _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); end; _buf = _buf.join("")
     end
   end
 
@@ -1068,9 +1068,9 @@ def convert_inline_break(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ((@text).to_s); 
-      ; _buf << ("<br>".freeze); 
-      ; _buf
+      _buf = []; _buf << (@text); 
+      ; _buf << ("<br>"); 
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1078,9 +1078,9 @@ def convert_inline_button(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('b', { :class => ['button'] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ((@text).to_s); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      _buf = []; _slim_controls1 = html_tag('b', { :class => ['button'] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << (@text); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1088,14 +1088,14 @@ def convert_inline_callout(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if @document.attr? :icons, 'font'; 
-      ; _buf << ("<i class=\"conum\"".freeze); _slim_codeattributes1 = @text; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" data-value".freeze); else; _buf << (" data-value=\"".freeze); _buf << ((_slim_codeattributes1).to_s); _buf << ("\"".freeze); end; end; _buf << ("></i><b>".freeze); 
-      ; _buf << (("(#{@text})").to_s); 
-      ; _buf << ("</b>".freeze); elsif @document.attr? :icons; 
-      ; _buf << ("<img".freeze); _slim_codeattributes2 = icon_uri("callouts/#{@text}"); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" src".freeze); else; _buf << (" src=\"".freeze); _buf << ((_slim_codeattributes2).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes3 = @text; if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" alt".freeze); else; _buf << (" alt=\"".freeze); _buf << ((_slim_codeattributes3).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      _buf = []; if @document.attr? :icons, 'font'; 
+      ; _buf << ("<i class=\"conum\""); _slim_codeattributes1 = @text; if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" data-value"); else; _buf << (" data-value=\""); _buf << (_slim_codeattributes1); _buf << ("\""); end; end; _buf << ("></i><b>"); 
+      ; _buf << ("(#{@text})"); 
+      ; _buf << ("</b>"); elsif @document.attr? :icons; 
+      ; _buf << ("<img"); _slim_codeattributes2 = icon_uri("callouts/#{@text}"); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" src"); else; _buf << (" src=\""); _buf << (_slim_codeattributes2); _buf << ("\""); end; end; _slim_codeattributes3 = @text; if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" alt"); else; _buf << (" alt=\""); _buf << (_slim_codeattributes3); _buf << ("\""); end; end; _buf << (">"); 
       ; else; 
-      ; _buf << ("<b>".freeze); _buf << (("(#{@text})").to_s); 
-      ; _buf << ("</b>".freeze); end; _buf
+      ; _buf << ("<b>"); _buf << ("(#{@text})"); 
+      ; _buf << ("</b>"); end; _buf = _buf.join("")
     end
   end
 
@@ -1103,20 +1103,20 @@ def convert_inline_footnote(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; footnote = slide_footnote(self); 
+      _buf = []; footnote = slide_footnote(self); 
       ; index = footnote.attr(:index); 
       ; id = footnote.id; 
       ; if @type == :xref; 
-      ; _slim_controls1 = html_tag('sup', { :class => ['footnoteref'] }.merge(data_attrs(footnote.attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ("[<span class=\"footnote\" title=\"View footnote.\">".freeze); 
-      ; _slim_controls2 << ((index).to_s); 
-      ; _slim_controls2 << ("</span>]".freeze); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); else; 
-      ; _slim_controls3 = html_tag('sup', { :id => ("_footnote_#{id}" if id), :class => ['footnote'] }.merge(data_attrs(footnote.attributes))) do; _slim_controls4 = ''; 
-      ; _slim_controls4 << ("[<span class=\"footnote\" title=\"View footnote.\">".freeze); 
-      ; _slim_controls4 << ((index).to_s); 
-      ; _slim_controls4 << ("</span>]".freeze); 
-      ; _slim_controls4; end; _buf << ((_slim_controls3).to_s); end; _buf
+      ; _slim_controls1 = html_tag('sup', { :class => ['footnoteref'] }.merge(data_attrs(footnote.attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << ("[<span class=\"footnote\" title=\"View footnote.\">"); 
+      ; _slim_controls2 << (index); 
+      ; _slim_controls2 << ("</span>]"); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); else; 
+      ; _slim_controls3 = html_tag('sup', { :id => ("_footnote_#{id}" if id), :class => ['footnote'] }.merge(data_attrs(footnote.attributes))) do; _slim_controls4 = []; 
+      ; _slim_controls4 << ("[<span class=\"footnote\" title=\"View footnote.\">"); 
+      ; _slim_controls4 << (index); 
+      ; _slim_controls4 << ("</span>]"); 
+      ; _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); end; _buf = _buf.join("")
     end
   end
 
@@ -1124,9 +1124,9 @@ def convert_inline_image(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('span', { :class => [@type, role, ('fragment' if (option? :step) || (attr? 'step'))], :style => ("float: #{attr :float}" if attr? :float) }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ((convert_inline_image).to_s); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      _buf = []; _slim_controls1 = html_tag('span', { :class => [@type, role, ('fragment' if (option? :step) || (attr? 'step'))], :style => ("float: #{attr :float}" if attr? :float) }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << (convert_inline_image); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1134,9 +1134,9 @@ def convert_inline_indexterm(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if @type == :visible; 
-      ; _buf << ((@text).to_s); 
-      ; end; _buf
+      _buf = []; if @type == :visible; 
+      ; _buf << (@text); 
+      ; end; _buf = _buf.join("")
     end
   end
 
@@ -1144,16 +1144,16 @@ def convert_inline_kbd(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if (keys = attr 'keys').size == 1; 
-      ; _slim_controls1 = html_tag('kbd', data_attrs(@attributes)) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ((keys.first).to_s); 
-      ; _slim_controls2; end; _buf << ((_slim_controls1).to_s); else; 
-      ; _slim_controls3 = html_tag('span', { :class => ['keyseq'] }.merge(data_attrs(@attributes))) do; _slim_controls4 = ''; 
+      _buf = []; if (keys = attr 'keys').size == 1; 
+      ; _slim_controls1 = html_tag('kbd', data_attrs(@attributes)) do; _slim_controls2 = []; 
+      ; _slim_controls2 << (keys.first); 
+      ; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); else; 
+      ; _slim_controls3 = html_tag('span', { :class => ['keyseq'] }.merge(data_attrs(@attributes))) do; _slim_controls4 = []; 
       ; keys.each_with_index do |key, idx|; 
       ; unless idx.zero?; 
-      ; _slim_controls4 << ("+".freeze); 
-      ; end; _slim_controls4 << ("<kbd>".freeze); _slim_controls4 << ((key).to_s); 
-      ; _slim_controls4 << ("</kbd>".freeze); end; _slim_controls4; end; _buf << ((_slim_controls3).to_s); end; _buf
+      ; _slim_controls4 << ("+"); 
+      ; end; _slim_controls4 << ("<kbd>"); _slim_controls4 << (key); 
+      ; _slim_controls4 << ("</kbd>"); end; _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); end; _buf = _buf.join("")
     end
   end
 
@@ -1161,23 +1161,23 @@ def convert_inline_menu(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; menu = attr 'menu'; 
+      _buf = []; menu = attr 'menu'; 
       ; menuitem = attr 'menuitem'; 
       ; if !(submenus = attr 'submenus').empty?; 
-      ; _slim_controls1 = html_tag('span', { :class => ['menuseq'] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ("<span class=\"menu\">".freeze); _slim_controls2 << ((menu).to_s); 
-      ; _slim_controls2 << ("</span>&#160;&#9656;&#32;".freeze); 
-      ; _slim_controls2 << ((submenus.map {|submenu| %(<span class="submenu">#{submenu}</span>&#160;&#9656;&#32;) }.join).to_s); 
-      ; _slim_controls2 << ("<span class=\"menuitem\">".freeze); _slim_controls2 << ((menuitem).to_s); 
-      ; _slim_controls2 << ("</span>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); elsif !menuitem.nil?; 
-      ; _slim_controls3 = html_tag('span', { :class => ['menuseq'] }.merge(data_attrs(@attributes))) do; _slim_controls4 = ''; 
-      ; _slim_controls4 << ("<span class=\"menu\">".freeze); _slim_controls4 << ((menu).to_s); 
-      ; _slim_controls4 << ("</span>&#160;&#9656;&#32;<span class=\"menuitem\">".freeze); 
-      ; _slim_controls4 << ((menuitem).to_s); 
-      ; _slim_controls4 << ("</span>".freeze); _slim_controls4; end; _buf << ((_slim_controls3).to_s); else; 
-      ; _slim_controls5 = html_tag('span', { :class => ['menu'] }.merge(data_attrs(@attributes))) do; _slim_controls6 = ''; 
-      ; _slim_controls6 << ((menu).to_s); 
-      ; _slim_controls6; end; _buf << ((_slim_controls5).to_s); end; _buf
+      ; _slim_controls1 = html_tag('span', { :class => ['menuseq'] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << ("<span class=\"menu\">"); _slim_controls2 << (menu); 
+      ; _slim_controls2 << ("</span>&#160;&#9656;&#32;"); 
+      ; _slim_controls2 << (submenus.map {|submenu| %(<span class="submenu">#{submenu}</span>&#160;&#9656;&#32;) }.join); 
+      ; _slim_controls2 << ("<span class=\"menuitem\">"); _slim_controls2 << (menuitem); 
+      ; _slim_controls2 << ("</span>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); elsif !menuitem.nil?; 
+      ; _slim_controls3 = html_tag('span', { :class => ['menuseq'] }.merge(data_attrs(@attributes))) do; _slim_controls4 = []; 
+      ; _slim_controls4 << ("<span class=\"menu\">"); _slim_controls4 << (menu); 
+      ; _slim_controls4 << ("</span>&#160;&#9656;&#32;<span class=\"menuitem\">"); 
+      ; _slim_controls4 << (menuitem); 
+      ; _slim_controls4 << ("</span>"); _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); else; 
+      ; _slim_controls5 = html_tag('span', { :class => ['menu'] }.merge(data_attrs(@attributes))) do; _slim_controls6 = []; 
+      ; _slim_controls6 << (menu); 
+      ; _slim_controls6 = _slim_controls6.join(""); end; _buf << (_slim_controls5); end; _buf = _buf.join("")
     end
   end
 
@@ -1185,21 +1185,21 @@ def convert_inline_quoted(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; quote_tags = { emphasis: 'em', strong: 'strong', monospaced: 'code', superscript: 'sup', subscript: 'sub' }; 
+      _buf = []; quote_tags = { emphasis: 'em', strong: 'strong', monospaced: 'code', superscript: 'sup', subscript: 'sub' }; 
       ; if (quote_tag = quote_tags[@type]); 
-      ; _buf << ((html_tag(quote_tag, { :id => @id, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact }.merge(data_attrs(@attributes)), @text)).to_s); 
+      ; _buf << (html_tag(quote_tag, { :id => @id, :class => [role, ('fragment' if (option? :step) || (attr? 'step'))].compact }.merge(data_attrs(@attributes)), @text)); 
       ; else; 
       ; case @type; 
       ; when :double; 
-      ; _buf << ((inline_text_container("&#8220;#{@text}&#8221;")).to_s); 
+      ; _buf << (inline_text_container("&#8220;#{@text}&#8221;")); 
       ; when :single; 
-      ; _buf << ((inline_text_container("&#8216;#{@text}&#8217;")).to_s); 
+      ; _buf << (inline_text_container("&#8216;#{@text}&#8217;")); 
       ; when :asciimath, :latexmath; 
       ; open, close = Asciidoctor::INLINE_MATH_DELIMITERS[@type]; 
-      ; _buf << ((inline_text_container("#{open}#{@text}#{close}")).to_s); 
+      ; _buf << (inline_text_container("#{open}#{@text}#{close}")); 
       ; else; 
-      ; _buf << ((inline_text_container(@text)).to_s); 
-      ; end; end; _buf
+      ; _buf << (inline_text_container(@text)); 
+      ; end; end; _buf = _buf.join("")
     end
   end
 
@@ -1207,7 +1207,7 @@ def convert_listing(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; nowrap = (option? 'nowrap') || !(document.attr? 'prewrap'); 
+      _buf = []; nowrap = (option? 'nowrap') || !(document.attr? 'prewrap'); 
       ; if @style == 'source'; 
       ; syntax_hl = document.syntax_highlighter; 
       ; lang = attr :language; 
@@ -1218,21 +1218,21 @@ def convert_listing(node, opts = {})
       ; opts = syntax_hl.highlight? ? { css_mode: css_mode, style: style } : {}; 
       ; opts[:nowrap] = nowrap; 
       ; end; 
-      ; end; _slim_controls1 = html_tag('div', { :id => id, :class => ['listingblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes.reject {|key, _| key == 'data-id' }))) do; _slim_controls2 = ''; 
+      ; end; _slim_controls1 = html_tag('div', { :id => id, :class => ['listingblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes.reject {|key, _| key == 'data-id' }))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((captioned_title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<div class=\"content\">".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (captioned_title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<div class=\"content\">"); 
       ; if syntax_hl; 
-      ; _slim_controls2 << (((syntax_hl.format self, lang, opts)).to_s); 
+      ; _slim_controls2 << ((syntax_hl.format self, lang, opts)); 
       ; else; 
       ; if @style == 'source'; 
-      ; _slim_controls2 << ("<pre".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = ['highlight', ('nowrap' if nowrap)]; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover1).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << ("><code".freeze); 
-      ; _temple_html_attributeremover2 = ''; _slim_codeattributes2 = [("language-#{lang}" if lang)]; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover2 << ((_slim_codeattributes2.join(" ")).to_s); else; _temple_html_attributeremover2 << ((_slim_codeattributes2).to_s); end; _temple_html_attributeremover2; if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover2).to_s); _slim_controls2 << ("\"".freeze); end; _slim_codeattributes3 = ("#{lang}" if lang); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" data-lang".freeze); else; _slim_controls2 << (" data-lang=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">".freeze); 
-      ; _slim_controls2 << ((content || '').to_s); 
-      ; _slim_controls2 << ("</code></pre>".freeze); else; 
-      ; _slim_controls2 << ("<pre".freeze); _temple_html_attributeremover3 = ''; _slim_codeattributes4 = [('nowrap' if nowrap)]; if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover3 << ((_slim_codeattributes4.join(" ")).to_s); else; _temple_html_attributeremover3 << ((_slim_codeattributes4).to_s); end; _temple_html_attributeremover3; if !_temple_html_attributeremover3.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover3).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << (">".freeze); 
-      ; _slim_controls2 << ((content || '').to_s); 
-      ; _slim_controls2 << ("</pre>".freeze); end; end; _slim_controls2 << ("</div>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<pre"); _temple_html_attributeremover1 = []; _slim_codeattributes1 = ['highlight', ('nowrap' if nowrap)]; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover1); _slim_controls2 << ("\""); end; _slim_controls2 << ("><code"); 
+      ; _temple_html_attributeremover2 = []; _slim_codeattributes2 = [("language-#{lang}" if lang)]; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover2 << (_slim_codeattributes2.join(" ")); else; _temple_html_attributeremover2 << (_slim_codeattributes2); end; _temple_html_attributeremover2 = _temple_html_attributeremover2.join(""); if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover2); _slim_controls2 << ("\""); end; _slim_codeattributes3 = ("#{lang}" if lang); if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" data-lang"); else; _slim_controls2 << (" data-lang=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">"); 
+      ; _slim_controls2 << (content || ''); 
+      ; _slim_controls2 << ("</code></pre>"); else; 
+      ; _slim_controls2 << ("<pre"); _temple_html_attributeremover3 = []; _slim_codeattributes4 = [('nowrap' if nowrap)]; if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover3 << (_slim_codeattributes4.join(" ")); else; _temple_html_attributeremover3 << (_slim_codeattributes4); end; _temple_html_attributeremover3 = _temple_html_attributeremover3.join(""); if !_temple_html_attributeremover3.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover3); _slim_controls2 << ("\""); end; _slim_controls2 << (">"); 
+      ; _slim_controls2 << (content || ''); 
+      ; _slim_controls2 << ("</pre>"); end; end; _slim_controls2 << ("</div>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1240,11 +1240,11 @@ def convert_literal(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => id, :class => ['literalblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => id, :class => ['literalblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<div class=\"content\"><pre".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = (!(@document.attr? :prewrap) || (option? 'nowrap') ? 'nowrap' : nil); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover1).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << (">".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</pre></div>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<div class=\"content\"><pre"); _temple_html_attributeremover1 = []; _slim_codeattributes1 = (!(@document.attr? :prewrap) || (option? 'nowrap') ? 'nowrap' : nil); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover1); _slim_controls2 << ("\""); end; _slim_controls2 << (">"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</pre></div>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1252,8 +1252,8 @@ def convert_notes(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ("<aside class=\"notes\">".freeze); _buf << ((resolve_content).to_s); 
-      ; _buf << ("</aside>".freeze); _buf
+      _buf = []; _buf << ("<aside class=\"notes\">"); _buf << (resolve_content); 
+      ; _buf << ("</aside>"); _buf = _buf.join("")
     end
   end
 
@@ -1261,16 +1261,16 @@ def convert_olist(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['olist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['olist', @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<ol".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = @style; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover1).to_s); _slim_controls2 << ("\"".freeze); end; _slim_codeattributes2 = (attr :start); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" start".freeze); else; _slim_controls2 << (" start=\"".freeze); _slim_controls2 << ((_slim_codeattributes2).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes3 = list_marker_keyword; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" type".freeze); else; _slim_controls2 << (" type=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<ol"); _temple_html_attributeremover1 = []; _slim_codeattributes1 = @style; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover1); _slim_controls2 << ("\""); end; _slim_codeattributes2 = (attr :start); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" start"); else; _slim_controls2 << (" start=\""); _slim_controls2 << (_slim_codeattributes2); _slim_controls2 << ("\""); end; end; _slim_codeattributes3 = list_marker_keyword; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" type"); else; _slim_controls2 << (" type=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">"); 
       ; items.each do |item|; 
-      ; _slim_controls2 << ("<li".freeze); _temple_html_attributeremover2 = ''; _slim_codeattributes4 = ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step')); if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover2 << ((_slim_codeattributes4.join(" ")).to_s); else; _temple_html_attributeremover2 << ((_slim_codeattributes4).to_s); end; _temple_html_attributeremover2; if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover2).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << ("><p>".freeze); 
-      ; _slim_controls2 << ((item.text).to_s); 
-      ; _slim_controls2 << ("</p>".freeze); if item.blocks?; 
-      ; _slim_controls2 << ((item.content).to_s); 
-      ; end; _slim_controls2 << ("</li>".freeze); end; _slim_controls2 << ("</ol>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<li"); _temple_html_attributeremover2 = []; _slim_codeattributes4 = ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step')); if Array === _slim_codeattributes4; _slim_codeattributes4 = _slim_codeattributes4.flatten; _slim_codeattributes4.map!(&:to_s); _slim_codeattributes4.reject!(&:empty?); _temple_html_attributeremover2 << (_slim_codeattributes4.join(" ")); else; _temple_html_attributeremover2 << (_slim_codeattributes4); end; _temple_html_attributeremover2 = _temple_html_attributeremover2.join(""); if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover2); _slim_controls2 << ("\""); end; _slim_controls2 << ("><p>"); 
+      ; _slim_controls2 << (item.text); 
+      ; _slim_controls2 << ("</p>"); if item.blocks?; 
+      ; _slim_controls2 << (item.content); 
+      ; end; _slim_controls2 << ("</li>"); end; _slim_controls2 << ("</ol>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1278,26 +1278,26 @@ def convert_open(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if @style == 'abstract'; 
+      _buf = []; if @style == 'abstract'; 
       ; if @parent == @document && @document.doctype == 'book'; 
       ; puts 'asciidoctor: WARNING: abstract block cannot be used in a document without a title when doctype is book. Excluding block content.'; 
       ; else; 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['quoteblock', 'abstract', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['quoteblock', 'abstract', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<blockquote>".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</blockquote>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); end; elsif @style == 'partintro' && (@level != 0 || @parent.context != :section || @document.doctype != 'book'); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<blockquote>"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</blockquote>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); end; elsif @style == 'partintro' && (@level != 0 || @parent.context != :section || @document.doctype != 'book'); 
       ; puts 'asciidoctor: ERROR: partintro block can only be used when doctype is book and it\'s a child of a book part. Excluding block content.'; 
       ; else; 
       ; if (has_role? 'aside') or (has_role? 'speaker') or (has_role? 'notes'); 
-      ; _buf << ("<aside class=\"notes\">".freeze); _buf << ((resolve_content).to_s); 
-      ; _buf << ("</aside>".freeze); 
+      ; _buf << ("<aside class=\"notes\">"); _buf << (resolve_content); 
+      ; _buf << ("</aside>"); 
       ; else; 
-      ; _slim_controls3 = html_tag('div', { :id => @id, :class => ['openblock', (@style != 'open' ? @style : nil), role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls4 = ''; 
+      ; _slim_controls3 = html_tag('div', { :id => @id, :class => ['openblock', (@style != 'open' ? @style : nil), role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls4 = []; 
       ; if title?; 
-      ; _slim_controls4 << ("<div class=\"title\">".freeze); _slim_controls4 << ((title).to_s); 
-      ; _slim_controls4 << ("</div>".freeze); end; _slim_controls4 << ("<div class=\"content\">".freeze); _slim_controls4 << ((content).to_s); 
-      ; _slim_controls4 << ("</div>".freeze); _slim_controls4; end; _buf << ((_slim_controls3).to_s); end; end; _buf
+      ; _slim_controls4 << ("<div class=\"title\">"); _slim_controls4 << (title); 
+      ; _slim_controls4 << ("</div>"); end; _slim_controls4 << ("<div class=\"content\">"); _slim_controls4 << (content); 
+      ; _slim_controls4 << ("</div>"); _slim_controls4 = _slim_controls4.join(""); end; _buf << (_slim_controls3); end; end; _buf = _buf.join("")
     end
   end
 
@@ -1305,16 +1305,16 @@ def convert_outline(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; unless sections.empty?; 
+      _buf = []; unless sections.empty?; 
       ; toclevels ||= (document.attr 'toclevels', DEFAULT_TOCLEVELS).to_i; 
       ; slevel = section_level sections.first; 
-      ; _buf << ("<ol class=\"sectlevel".freeze); _buf << ((slevel).to_s); _buf << ("\">".freeze); 
+      ; _buf << ("<ol class=\"sectlevel"); _buf << (slevel); _buf << ("\">"); 
       ; sections.each do |sec|; 
-      ; _buf << ("<li><a href=\"#".freeze); 
-      ; _buf << ((sec.id).to_s); _buf << ("\">".freeze); _buf << ((section_title sec).to_s); 
-      ; _buf << ("</a>".freeze); if (sec.level < toclevels) && (child_toc = converter.convert sec, 'outline'); 
-      ; _buf << ((child_toc).to_s); 
-      ; end; _buf << ("</li>".freeze); end; _buf << ("</ol>".freeze); end; _buf
+      ; _buf << ("<li><a href=\"#"); 
+      ; _buf << (sec.id); _buf << ("\">"); _buf << (section_title sec); 
+      ; _buf << ("</a>"); if (sec.level < toclevels) && (child_toc = converter.convert sec, 'outline'); 
+      ; _buf << (child_toc); 
+      ; end; _buf << ("</li>"); end; _buf << ("</ol>"); end; _buf = _buf.join("")
     end
   end
 
@@ -1322,8 +1322,8 @@ def convert_page_break(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ("<div style=\"page-break-after: always;\"></div>".freeze); 
-      ; _buf
+      _buf = []; _buf << ("<div style=\"page-break-after: always;\"></div>"); 
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1331,14 +1331,14 @@ def convert_paragraph(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['paragraph', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['paragraph', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; if has_role? 'small'; 
-      ; _slim_controls2 << ("<small>".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</small>".freeze); else; 
-      ; _slim_controls2 << ("<p>".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</p>".freeze); end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; if has_role? 'small'; 
+      ; _slim_controls2 << ("<small>"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</small>"); else; 
+      ; _slim_controls2 << ("<p>"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</p>"); end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1346,8 +1346,8 @@ def convert_pass(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ((content).to_s); 
-      ; _buf
+      _buf = []; _buf << (content); 
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1355,9 +1355,9 @@ def convert_preamble(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; 
+      _buf = []; 
       ; 
-      ; _buf
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1365,21 +1365,21 @@ def convert_quote(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['quoteblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['quoteblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<blockquote>".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</blockquote>".freeze); attribution = (attr? :attribution) ? (attr :attribution) : nil; 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<blockquote>"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</blockquote>"); attribution = (attr? :attribution) ? (attr :attribution) : nil; 
       ; citetitle = (attr? :citetitle) ? (attr :citetitle) : nil; 
       ; if attribution || citetitle; 
-      ; _slim_controls2 << ("<div class=\"attribution\">".freeze); 
+      ; _slim_controls2 << ("<div class=\"attribution\">"); 
       ; if citetitle; 
-      ; _slim_controls2 << ("<cite>".freeze); _slim_controls2 << ((citetitle).to_s); 
-      ; _slim_controls2 << ("</cite>".freeze); end; if attribution; 
+      ; _slim_controls2 << ("<cite>"); _slim_controls2 << (citetitle); 
+      ; _slim_controls2 << ("</cite>"); end; if attribution; 
       ; if citetitle; 
-      ; _slim_controls2 << ("<br>".freeze); 
-      ; end; _slim_controls2 << ("&#8212; ".freeze); _slim_controls2 << ((attribution).to_s); 
-      ; end; _slim_controls2 << ("</div>".freeze); end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<br>"); 
+      ; end; _slim_controls2 << ("&#8212; "); _slim_controls2 << (attribution); 
+      ; end; _slim_controls2 << ("</div>"); end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1387,8 +1387,8 @@ def convert_ruler(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ("<hr>".freeze); 
-      ; _buf
+      _buf = []; _buf << ("<hr>"); 
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1396,16 +1396,16 @@ def convert_sidebar(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if (has_role? 'aside') or (has_role? 'speaker') or (has_role? 'notes'); 
-      ; _buf << ("<aside class=\"notes\">".freeze); _buf << ((resolve_content).to_s); 
-      ; _buf << ("</aside>".freeze); 
+      _buf = []; if (has_role? 'aside') or (has_role? 'speaker') or (has_role? 'notes'); 
+      ; _buf << ("<aside class=\"notes\">"); _buf << (resolve_content); 
+      ; _buf << ("</aside>"); 
       ; else; 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['sidebarblock', role, ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
-      ; _slim_controls2 << ("<div class=\"content\">".freeze); 
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['sidebarblock', role, ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
+      ; _slim_controls2 << ("<div class=\"content\">"); 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); end; _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</div>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); end; _buf = _buf.join("")
     end
   end
 
@@ -1413,17 +1413,17 @@ def convert_stem(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; open, close = Asciidoctor::BLOCK_MATH_DELIMITERS[@style.to_sym]; 
+      _buf = []; open, close = Asciidoctor::BLOCK_MATH_DELIMITERS[@style.to_sym]; 
       ; equation = content.strip; 
       ; if (@subs.nil? || @subs.empty?) && !(attr? 'subs'); 
       ; equation = sub_specialcharacters equation; 
       ; end; unless (equation.start_with? open) && (equation.end_with? close); 
       ; equation = %(#{open}#{equation}#{close}); 
-      ; end; _slim_controls1 = html_tag('div', { :id => @id, :class => ['stemblock', role, ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; end; _slim_controls1 = html_tag('div', { :id => @id, :class => ['stemblock', role, ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<div class=\"content\">".freeze); _slim_controls2 << ((equation).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<div class=\"content\">"); _slim_controls2 << (equation); 
+      ; _slim_controls2 << ("</div>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1431,7 +1431,7 @@ def convert_stretch_nested_elements(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ("<script>var dom = {};\ndom.slides = document.querySelector('.reveal .slides');\n\nfunction getRemainingHeight(element, slideElement, height) {\n  height = height || 0;\n  if (element) {\n    var newHeight, oldHeight = element.style.height;\n    // Change the .stretch element height to 0 in order find the height of all\n    // the other elements\n    element.style.height = '0px';\n    // In Overview mode, the parent (.slide) height is set of 700px.\n    // Restore it temporarily to its natural height.\n    slideElement.style.height = 'auto';\n    newHeight = height - slideElement.offsetHeight;\n    // Restore the old height, just in case\n    element.style.height = oldHeight + 'px';\n    // Clear the parent (.slide) height. .removeProperty works in IE9+\n    slideElement.style.removeProperty('height');\n    return newHeight;\n  }\n  return height;\n}\n\nfunction layoutSlideContents(width, height) {\n  // Handle sizing of elements with the 'stretch' class\n  toArray(dom.slides.querySelectorAll('section .stretch')).forEach(function (element) {\n    // Determine how much vertical space we can use\n    var limit = 5; // hard limit\n    var parent = element.parentNode;\n    while (parent.nodeName !== 'SECTION' && limit > 0) {\n      parent = parent.parentNode;\n      limit--;\n    }\n    if (limit === 0) {\n      // unable to find parent, aborting!\n      return;\n    }\n    var remainingHeight = getRemainingHeight(element, parent, height);\n    // Consider the aspect ratio of media elements\n    if (/(img|video)/gi.test(element.nodeName)) {\n      var nw = element.naturalWidth || element.videoWidth, nh = element.naturalHeight || element.videoHeight;\n      var es = Math.min(width / nw, remainingHeight / nh);\n      element.style.width = (nw * es) + 'px';\n      element.style.height = (nh * es) + 'px';\n    } else {\n      element.style.width = width + 'px';\n      element.style.height = remainingHeight + 'px';\n    }\n  });\n}\n\nfunction toArray(o) {\n  return Array.prototype.slice.call(o);\n}\n\nReveal.addEventListener('slidechanged', function () {\n  layoutSlideContents(".freeze); 
+      _buf = []; _buf << ("<script>var dom = {};\ndom.slides = document.querySelector('.reveal .slides');\n\nfunction getRemainingHeight(element, slideElement, height) {\n  height = height || 0;\n  if (element) {\n    var newHeight, oldHeight = element.style.height;\n    // Change the .stretch element height to 0 in order find the height of all\n    // the other elements\n    element.style.height = '0px';\n    // In Overview mode, the parent (.slide) height is set of 700px.\n    // Restore it temporarily to its natural height.\n    slideElement.style.height = 'auto';\n    newHeight = height - slideElement.offsetHeight;\n    // Restore the old height, just in case\n    element.style.height = oldHeight + 'px';\n    // Clear the parent (.slide) height. .removeProperty works in IE9+\n    slideElement.style.removeProperty('height');\n    return newHeight;\n  }\n  return height;\n}\n\nfunction layoutSlideContents(width, height) {\n  // Handle sizing of elements with the 'stretch' class\n  toArray(dom.slides.querySelectorAll('section .stretch')).forEach(function (element) {\n    // Determine how much vertical space we can use\n    var limit = 5; // hard limit\n    var parent = element.parentNode;\n    while (parent.nodeName !== 'SECTION' && limit > 0) {\n      parent = parent.parentNode;\n      limit--;\n    }\n    if (limit === 0) {\n      // unable to find parent, aborting!\n      return;\n    }\n    var remainingHeight = getRemainingHeight(element, parent, height);\n    // Consider the aspect ratio of media elements\n    if (/(img|video)/gi.test(element.nodeName)) {\n      var nw = element.naturalWidth || element.videoWidth, nh = element.naturalHeight || element.videoHeight;\n      var es = Math.min(width / nw, remainingHeight / nh);\n      element.style.width = (nw * es) + 'px';\n      element.style.height = (nh * es) + 'px';\n    } else {\n      element.style.width = width + 'px';\n      element.style.height = remainingHeight + 'px';\n    }\n  });\n}\n\nfunction toArray(o) {\n  return Array.prototype.slice.call(o);\n}\n\nReveal.addEventListener('slidechanged', function () {\n  layoutSlideContents("); 
       ; 
       ; 
       ; 
@@ -1488,15 +1488,15 @@ def convert_stretch_nested_elements(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});\nReveal.addEventListener('ready', function () {\n  layoutSlideContents(".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});\nReveal.addEventListener('ready', function () {\n  layoutSlideContents("); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});\nReveal.addEventListener('resize', function () {\n  layoutSlideContents(".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});\nReveal.addEventListener('resize', function () {\n  layoutSlideContents("); 
       ; 
       ; 
-      ; _buf << ((attr 'revealjs_width', 960).to_s); _buf << (", ".freeze); _buf << ((attr 'revealjs_height', 700).to_s); _buf << (")\n});</script>".freeze); 
+      ; _buf << (attr 'revealjs_width', 960); _buf << (", "); _buf << (attr 'revealjs_height', 700); _buf << (")\n});</script>"); 
       ; 
-      ; _buf
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1504,24 +1504,24 @@ def convert_table(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; classes = ['tableblock', "frame-#{attr :frame, 'all'}", "grid-#{attr :grid, 'all'}", role, ('fragment' if (option? :step) || (attr? 'step'))]; 
+      _buf = []; classes = ['tableblock', "frame-#{attr :frame, 'all'}", "grid-#{attr :grid, 'all'}", role, ('fragment' if (option? :step) || (attr? 'step'))]; 
       ; styles = [("width:#{attr :tablepcwidth}%" unless option? 'autowidth'), ("float:#{attr :float}" if attr? :float)].compact.join('; '); 
-      ; _slim_controls1 = html_tag('table', { :id => @id, :class => classes, :style => styles }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; _slim_controls1 = html_tag('table', { :id => @id, :class => classes, :style => styles }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<caption class=\"title\">".freeze); _slim_controls2 << ((captioned_title).to_s); 
-      ; _slim_controls2 << ("</caption>".freeze); end; unless (attr :rowcount).zero?; 
-      ; _slim_controls2 << ("<colgroup>".freeze); 
+      ; _slim_controls2 << ("<caption class=\"title\">"); _slim_controls2 << (captioned_title); 
+      ; _slim_controls2 << ("</caption>"); end; unless (attr :rowcount).zero?; 
+      ; _slim_controls2 << ("<colgroup>"); 
       ; if option? 'autowidth'; 
       ; @columns.each do; 
-      ; _slim_controls2 << ("<col>".freeze); 
+      ; _slim_controls2 << ("<col>"); 
       ; end; else; 
       ; @columns.each do |col|; 
-      ; _slim_controls2 << ("<col style=\"width:".freeze); _slim_controls2 << ((col.attr :colpcwidth).to_s); _slim_controls2 << ("%\">".freeze); 
-      ; end; end; _slim_controls2 << ("</colgroup>".freeze); [:head, :foot, :body].select {|tblsec| !@rows[tblsec].empty? }.each do |tblsec|; 
+      ; _slim_controls2 << ("<col style=\"width:"); _slim_controls2 << (col.attr :colpcwidth); _slim_controls2 << ("%\">"); 
+      ; end; end; _slim_controls2 << ("</colgroup>"); [:head, :foot, :body].select {|tblsec| !@rows[tblsec].empty? }.each do |tblsec|; 
       ; 
-      ; _slim_controls2 << ("<t".freeze); _slim_controls2 << ((tblsec).to_s); _slim_controls2 << (">".freeze); 
+      ; _slim_controls2 << ("<t"); _slim_controls2 << (tblsec); _slim_controls2 << (">"); 
       ; @rows[tblsec].each do |row|; 
-      ; _slim_controls2 << ("<tr>".freeze); 
+      ; _slim_controls2 << ("<tr>"); 
       ; row.each do |cell|; 
       ; 
       ; if tblsec == :head; 
@@ -1535,22 +1535,22 @@ def convert_table(node, opts = {})
       ; end; end; _slim_controls3 = html_tag(tblsec == :head || cell.style == :header ? 'th' : 'td',
       :class=>['tableblock', "halign-#{cell.attr :halign}", "valign-#{cell.attr :valign}"],
       :colspan=>cell.colspan, :rowspan=>cell.rowspan,
-      :style=>((@document.attr? :cellbgcolor) ? %(background-color:#{@document.attr :cellbgcolor};) : nil)) do; _slim_controls4 = ''; 
+      :style=>((@document.attr? :cellbgcolor) ? %(background-color:#{@document.attr :cellbgcolor};) : nil)) do; _slim_controls4 = []; 
       ; if tblsec == :head; 
-      ; _slim_controls4 << ((cell_content).to_s); 
+      ; _slim_controls4 << (cell_content); 
       ; else; 
       ; case cell.style; 
       ; when :asciidoc; 
-      ; _slim_controls4 << ("<div>".freeze); _slim_controls4 << ((cell_content).to_s); 
-      ; _slim_controls4 << ("</div>".freeze); when :literal; 
-      ; _slim_controls4 << ("<div class=\"literal\"><pre>".freeze); _slim_controls4 << ((cell_content).to_s); 
-      ; _slim_controls4 << ("</pre></div>".freeze); when :header; 
+      ; _slim_controls4 << ("<div>"); _slim_controls4 << (cell_content); 
+      ; _slim_controls4 << ("</div>"); when :literal; 
+      ; _slim_controls4 << ("<div class=\"literal\"><pre>"); _slim_controls4 << (cell_content); 
+      ; _slim_controls4 << ("</pre></div>"); when :header; 
       ; cell_content.each do |text|; 
-      ; _slim_controls4 << ("<p class=\"tableblock header\">".freeze); _slim_controls4 << ((text).to_s); 
-      ; _slim_controls4 << ("</p>".freeze); end; else; 
+      ; _slim_controls4 << ("<p class=\"tableblock header\">"); _slim_controls4 << (text); 
+      ; _slim_controls4 << ("</p>"); end; else; 
       ; cell_content.each do |text|; 
-      ; _slim_controls4 << ("<p class=\"tableblock\">".freeze); _slim_controls4 << ((text).to_s); 
-      ; _slim_controls4 << ("</p>".freeze); end; end; end; _slim_controls4; end; _slim_controls2 << ((_slim_controls3).to_s); end; _slim_controls2 << ("</tr>".freeze); end; end; end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls4 << ("<p class=\"tableblock\">"); _slim_controls4 << (text); 
+      ; _slim_controls4 << ("</p>"); end; end; end; _slim_controls4 = _slim_controls4.join(""); end; _slim_controls2 << (_slim_controls3); end; _slim_controls2 << ("</tr>"); end; end; end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1558,8 +1558,8 @@ def convert_thematic_break(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _buf << ("<hr>".freeze); 
-      ; _buf
+      _buf = []; _buf << ("<hr>"); 
+      ; _buf = _buf.join("")
     end
   end
 
@@ -1567,7 +1567,7 @@ def convert_title_slide(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; bg_image = (attr? 'title-slide-background-image') ? (image_uri(attr 'title-slide-background-image')) : nil; 
+      _buf = []; bg_image = (attr? 'title-slide-background-image') ? (image_uri(attr 'title-slide-background-image')) : nil; 
       ; bg_video = (attr? 'title-slide-background-video') ? (media_uri(attr 'title-slide-background-video')) : nil; 
       ; 
       ; 
@@ -1584,17 +1584,17 @@ def convert_title_slide(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ("<section".freeze); _temple_html_attributeremover1 = ''; _temple_html_attributemerger1 = []; _temple_html_attributemerger1[0] = "title"; _temple_html_attributemerger1[1] = ''; _slim_codeattributes1 = role; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributemerger1[1] << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributemerger1[1] << ((_slim_codeattributes1).to_s); end; _temple_html_attributemerger1[1]; _temple_html_attributeremover1 << ((_temple_html_attributemerger1.reject(&:empty?).join(" ")).to_s); _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _buf << (" class=\"".freeze); _buf << ((_temple_html_attributeremover1).to_s); _buf << ("\"".freeze); end; _buf << (" data-state=\"title\"".freeze); _slim_codeattributes2 = (attr 'title-slide-transition'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" data-transition".freeze); else; _buf << (" data-transition=\"".freeze); _buf << ((_slim_codeattributes2).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes3 = (attr 'title-slide-transition-speed'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-transition-speed".freeze); else; _buf << (" data-transition-speed=\"".freeze); _buf << ((_slim_codeattributes3).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes4 = (attr 'title-slide-background'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-background".freeze); else; _buf << (" data-background=\"".freeze); _buf << ((_slim_codeattributes4).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes5 = (attr 'title-slide-background-size'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-background-size".freeze); else; _buf << (" data-background-size=\"".freeze); _buf << ((_slim_codeattributes5).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes6 = bg_image; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-image".freeze); else; _buf << (" data-background-image=\"".freeze); _buf << ((_slim_codeattributes6).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes7 = bg_video; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-video".freeze); else; _buf << (" data-background-video=\"".freeze); _buf << ((_slim_codeattributes7).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes8 = (attr 'title-slide-background-video-loop'); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-video-loop".freeze); else; _buf << (" data-background-video-loop=\"".freeze); _buf << ((_slim_codeattributes8).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes9 = (attr 'title-slide-background-video-muted'); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-video-muted".freeze); else; _buf << (" data-background-video-muted=\"".freeze); _buf << ((_slim_codeattributes9).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes10 = (attr 'title-slide-background-opacity'); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-opacity".freeze); else; _buf << (" data-background-opacity=\"".freeze); _buf << ((_slim_codeattributes10).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes11 = (attr 'title-slide-background-iframe'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-iframe".freeze); else; _buf << (" data-background-iframe=\"".freeze); _buf << ((_slim_codeattributes11).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes12 = (attr 'title-slide-background-color'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-color".freeze); else; _buf << (" data-background-color=\"".freeze); _buf << ((_slim_codeattributes12).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes13 = (attr 'title-slide-background-repeat'); if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-repeat".freeze); else; _buf << (" data-background-repeat=\"".freeze); _buf << ((_slim_codeattributes13).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes14 = (attr 'title-slide-background-position'); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-position".freeze); else; _buf << (" data-background-position=\"".freeze); _buf << ((_slim_codeattributes14).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes15 = (attr 'title-slide-background-transition'); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-transition".freeze); else; _buf << (" data-background-transition=\"".freeze); _buf << ((_slim_codeattributes15).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<section"); _temple_html_attributeremover1 = []; _temple_html_attributemerger1 = []; _temple_html_attributemerger1[0] = "title"; _temple_html_attributemerger1[1] = []; _slim_codeattributes1 = role; if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributemerger1[1] << (_slim_codeattributes1.join(" ")); else; _temple_html_attributemerger1[1] << (_slim_codeattributes1); end; _temple_html_attributemerger1[1] = _temple_html_attributemerger1[1].join(""); _temple_html_attributeremover1 << (_temple_html_attributemerger1.reject(&:empty?).join(" ")); _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _buf << (" class=\""); _buf << (_temple_html_attributeremover1); _buf << ("\""); end; _buf << (" data-state=\"title\""); _slim_codeattributes2 = (attr 'title-slide-transition'); if _slim_codeattributes2; if _slim_codeattributes2 == true; _buf << (" data-transition"); else; _buf << (" data-transition=\""); _buf << (_slim_codeattributes2); _buf << ("\""); end; end; _slim_codeattributes3 = (attr 'title-slide-transition-speed'); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-transition-speed"); else; _buf << (" data-transition-speed=\""); _buf << (_slim_codeattributes3); _buf << ("\""); end; end; _slim_codeattributes4 = (attr 'title-slide-background'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-background"); else; _buf << (" data-background=\""); _buf << (_slim_codeattributes4); _buf << ("\""); end; end; _slim_codeattributes5 = (attr 'title-slide-background-size'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-background-size"); else; _buf << (" data-background-size=\""); _buf << (_slim_codeattributes5); _buf << ("\""); end; end; _slim_codeattributes6 = bg_image; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-image"); else; _buf << (" data-background-image=\""); _buf << (_slim_codeattributes6); _buf << ("\""); end; end; _slim_codeattributes7 = bg_video; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-video"); else; _buf << (" data-background-video=\""); _buf << (_slim_codeattributes7); _buf << ("\""); end; end; _slim_codeattributes8 = (attr 'title-slide-background-video-loop'); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-video-loop"); else; _buf << (" data-background-video-loop=\""); _buf << (_slim_codeattributes8); _buf << ("\""); end; end; _slim_codeattributes9 = (attr 'title-slide-background-video-muted'); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-video-muted"); else; _buf << (" data-background-video-muted=\""); _buf << (_slim_codeattributes9); _buf << ("\""); end; end; _slim_codeattributes10 = (attr 'title-slide-background-opacity'); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-opacity"); else; _buf << (" data-background-opacity=\""); _buf << (_slim_codeattributes10); _buf << ("\""); end; end; _slim_codeattributes11 = (attr 'title-slide-background-iframe'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-iframe"); else; _buf << (" data-background-iframe=\""); _buf << (_slim_codeattributes11); _buf << ("\""); end; end; _slim_codeattributes12 = (attr 'title-slide-background-color'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-color"); else; _buf << (" data-background-color=\""); _buf << (_slim_codeattributes12); _buf << ("\""); end; end; _slim_codeattributes13 = (attr 'title-slide-background-repeat'); if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-repeat"); else; _buf << (" data-background-repeat=\""); _buf << (_slim_codeattributes13); _buf << ("\""); end; end; _slim_codeattributes14 = (attr 'title-slide-background-position'); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-position"); else; _buf << (" data-background-position=\""); _buf << (_slim_codeattributes14); _buf << ("\""); end; end; _slim_codeattributes15 = (attr 'title-slide-background-transition'); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-transition"); else; _buf << (" data-background-transition=\""); _buf << (_slim_codeattributes15); _buf << ("\""); end; end; _buf << (">"); 
       ; if (_title_obj = doctitle partition: true, use_fallback: true).subtitle?; 
-      ; _buf << ("<h1>".freeze); _buf << ((slice_text _title_obj.title, (_slice = header.option? :slice)).to_s); 
-      ; _buf << ("</h1><h2>".freeze); _buf << ((slice_text _title_obj.subtitle, _slice).to_s); 
-      ; _buf << ("</h2>".freeze); else; 
-      ; _buf << ("<h1>".freeze); _buf << ((@header.title).to_s); 
-      ; _buf << ("</h1>".freeze); end; preamble = @document.find_by context: :preamble; 
+      ; _buf << ("<h1>"); _buf << (slice_text _title_obj.title, (_slice = header.option? :slice)); 
+      ; _buf << ("</h1><h2>"); _buf << (slice_text _title_obj.subtitle, _slice); 
+      ; _buf << ("</h2>"); else; 
+      ; _buf << ("<h1>"); _buf << (@header.title); 
+      ; _buf << ("</h1>"); end; preamble = @document.find_by context: :preamble; 
       ; unless preamble.nil? or preamble.length == 0; 
-      ; _buf << ("<div class=\"preamble\">".freeze); _buf << ((preamble.pop.content).to_s); 
-      ; _buf << ("</div>".freeze); end; _buf << ((generate_authors(@document)).to_s); 
-      ; _buf << ("</section>".freeze); _buf
+      ; _buf << ("<div class=\"preamble\">"); _buf << (preamble.pop.content); 
+      ; _buf << ("</div>"); end; _buf << (generate_authors(@document)); 
+      ; _buf << ("</section>"); _buf = _buf.join("")
     end
   end
 
@@ -1602,7 +1602,7 @@ def convert_toc(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; 
+      _buf = []; 
       ; 
       ; 
       ; 
@@ -1615,11 +1615,11 @@ def convert_toc(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ("<div id=\"toc\"".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = (document.attr 'toc-class', 'toc'); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _buf << (" class=\"".freeze); _buf << ((_temple_html_attributeremover1).to_s); _buf << ("\"".freeze); end; _buf << ("><div id=\"toctitle\">".freeze); 
-      ; _buf << (((document.attr 'toc-title')).to_s); 
-      ; _buf << ("</div>".freeze); 
-      ; _buf << ((converter.convert document, 'outline').to_s); 
-      ; _buf << ("</div>".freeze); _buf
+      ; _buf << ("<div id=\"toc\""); _temple_html_attributeremover1 = []; _slim_codeattributes1 = (document.attr 'toc-class', 'toc'); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _buf << (" class=\""); _buf << (_temple_html_attributeremover1); _buf << ("\""); end; _buf << ("><div id=\"toctitle\">"); 
+      ; _buf << ((document.attr 'toc-title')); 
+      ; _buf << ("</div>"); 
+      ; _buf << (converter.convert document, 'outline'); 
+      ; _buf << ("</div>"); _buf = _buf.join("")
     end
   end
 
@@ -1627,7 +1627,7 @@ def convert_ulist(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; if (checklist = (option? :checklist) ? 'checklist' : nil); 
+      _buf = []; if (checklist = (option? :checklist) ? 'checklist' : nil); 
       ; if option? :interactive; 
       ; marker_checked = '<input type="checkbox" data-item-complete="1" checked>'; 
       ; marker_unchecked = '<input type="checkbox" data-item-complete="0">'; 
@@ -1639,20 +1639,20 @@ def convert_ulist(node, opts = {})
       ; 
       ; marker_checked = '<input type="checkbox" data-item-complete="1" checked disabled>'; 
       ; marker_unchecked = '<input type="checkbox" data-item-complete="0" disabled>'; 
-      ; end; end; end; _slim_controls1 = html_tag('div', { :id => @id, :class => ['ulist', checklist, @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; end; end; end; _slim_controls1 = html_tag('div', { :id => @id, :class => ['ulist', checklist, @style, role] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<ul".freeze); _temple_html_attributeremover1 = ''; _slim_codeattributes1 = (checklist || @style); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes1.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes1).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover1).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << (">".freeze); 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<ul"); _temple_html_attributeremover1 = []; _slim_codeattributes1 = (checklist || @style); if Array === _slim_codeattributes1; _slim_codeattributes1 = _slim_codeattributes1.flatten; _slim_codeattributes1.map!(&:to_s); _slim_codeattributes1.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes1.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes1); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover1); _slim_controls2 << ("\""); end; _slim_controls2 << (">"); 
       ; items.each do |item|; 
-      ; _slim_controls2 << ("<li".freeze); _temple_html_attributeremover2 = ''; _slim_codeattributes2 = ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step')); if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover2 << ((_slim_codeattributes2.join(" ")).to_s); else; _temple_html_attributeremover2 << ((_slim_codeattributes2).to_s); end; _temple_html_attributeremover2; if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\"".freeze); _slim_controls2 << ((_temple_html_attributeremover2).to_s); _slim_controls2 << ("\"".freeze); end; _slim_controls2 << ("><p>".freeze); 
+      ; _slim_controls2 << ("<li"); _temple_html_attributeremover2 = []; _slim_codeattributes2 = ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step')); if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover2 << (_slim_codeattributes2.join(" ")); else; _temple_html_attributeremover2 << (_slim_codeattributes2); end; _temple_html_attributeremover2 = _temple_html_attributeremover2.join(""); if !_temple_html_attributeremover2.empty?; _slim_controls2 << (" class=\""); _slim_controls2 << (_temple_html_attributeremover2); _slim_controls2 << ("\""); end; _slim_controls2 << ("><p>"); 
       ; 
       ; if checklist && (item.attr? :checkbox); 
-      ; _slim_controls2 << ((%(#{(item.attr? :checked) ? marker_checked : marker_unchecked}#{item.text})).to_s); 
+      ; _slim_controls2 << (%(#{(item.attr? :checked) ? marker_checked : marker_unchecked}#{item.text})); 
       ; else; 
-      ; _slim_controls2 << ((item.text).to_s); 
-      ; end; _slim_controls2 << ("</p>".freeze); if item.blocks?; 
-      ; _slim_controls2 << ((item.content).to_s); 
-      ; end; _slim_controls2 << ("</li>".freeze); end; _slim_controls2 << ("</ul>".freeze); _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << (item.text); 
+      ; end; _slim_controls2 << ("</p>"); if item.blocks?; 
+      ; _slim_controls2 << (item.content); 
+      ; end; _slim_controls2 << ("</li>"); end; _slim_controls2 << ("</ul>"); _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1660,21 +1660,21 @@ def convert_verse(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; _slim_controls1 = html_tag('div', { :id => @id, :class => ['verseblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      _buf = []; _slim_controls1 = html_tag('div', { :id => @id, :class => ['verseblock', role, ('fragment' if (option? :step) || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; _slim_controls2 << ("<pre class=\"content\">".freeze); _slim_controls2 << ((content).to_s); 
-      ; _slim_controls2 << ("</pre>".freeze); attribution = (attr? :attribution) ? (attr :attribution) : nil; 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (title); 
+      ; _slim_controls2 << ("</div>"); end; _slim_controls2 << ("<pre class=\"content\">"); _slim_controls2 << (content); 
+      ; _slim_controls2 << ("</pre>"); attribution = (attr? :attribution) ? (attr :attribution) : nil; 
       ; citetitle = (attr? :citetitle) ? (attr :citetitle) : nil; 
       ; if attribution || citetitle; 
-      ; _slim_controls2 << ("<div class=\"attribution\">".freeze); 
+      ; _slim_controls2 << ("<div class=\"attribution\">"); 
       ; if citetitle; 
-      ; _slim_controls2 << ("<cite>".freeze); _slim_controls2 << ((citetitle).to_s); 
-      ; _slim_controls2 << ("</cite>".freeze); end; if attribution; 
+      ; _slim_controls2 << ("<cite>"); _slim_controls2 << (citetitle); 
+      ; _slim_controls2 << ("</cite>"); end; if attribution; 
       ; if citetitle; 
-      ; _slim_controls2 << ("<br>".freeze); 
-      ; end; _slim_controls2 << ("&#8212; ".freeze); _slim_controls2 << ((attribution).to_s); 
-      ; end; _slim_controls2 << ("</div>".freeze); end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; _slim_controls2 << ("<br>"); 
+      ; end; _slim_controls2 << ("&#8212; "); _slim_controls2 << (attribution); 
+      ; end; _slim_controls2 << ("</div>"); end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1682,16 +1682,16 @@ def convert_video(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; 
+      _buf = []; 
       ; 
       ; no_stretch = ((attr? :width) || (attr? :height)); 
       ; width = (attr? :width) ? (attr :width) : "100%"; 
       ; height = (attr? :height) ? (attr :height) : "100%"; 
       ; 
-      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['videoblock', @style, role, (no_stretch ? nil : 'stretch'), ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = ''; 
+      ; _slim_controls1 = html_tag('div', { :id => @id, :class => ['videoblock', @style, role, (no_stretch ? nil : 'stretch'), ('fragment' if (option? :step) || (has_role? 'step') || (attr? 'step'))] }.merge(data_attrs(@attributes))) do; _slim_controls2 = []; 
       ; if title?; 
-      ; _slim_controls2 << ("<div class=\"title\">".freeze); _slim_controls2 << ((captioned_title).to_s); 
-      ; _slim_controls2 << ("</div>".freeze); end; case attr :poster; 
+      ; _slim_controls2 << ("<div class=\"title\">"); _slim_controls2 << (captioned_title); 
+      ; _slim_controls2 << ("</div>"); end; case attr :poster; 
       ; when 'vimeo'; 
       ; unless (asset_uri_scheme = (attr :asset_uri_scheme, 'https')).empty?; 
       ; asset_uri_scheme = %(#{asset_uri_scheme}:); 
@@ -1705,7 +1705,7 @@ def convert_video(node, opts = {})
       ; 
       ; 
       ; 
-      ; _slim_controls2 << ("<iframe".freeze); _slim_codeattributes1 = (width); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" width".freeze); else; _slim_controls2 << (" width=\"".freeze); _slim_controls2 << ((_slim_codeattributes1).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes2 = (height); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" height".freeze); else; _slim_controls2 << (" height=\"".freeze); _slim_controls2 << ((_slim_codeattributes2).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes3 = src; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes3).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes4 = 0; if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" frameborder".freeze); else; _slim_controls2 << (" frameborder=\"".freeze); _slim_controls2 << ((_slim_codeattributes4).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (" webkitAllowFullScreen mozallowfullscreen allowFullScreen".freeze); _slim_codeattributes5 = (option? 'autoplay'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _slim_controls2 << (" data-autoplay".freeze); else; _slim_controls2 << (" data-autoplay=\"".freeze); _slim_controls2 << ((_slim_codeattributes5).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes6 = ((option? 'autoplay') ? "autoplay" : nil); if _slim_codeattributes6; if _slim_codeattributes6 == true; _slim_controls2 << (" allow".freeze); else; _slim_controls2 << (" allow=\"".freeze); _slim_controls2 << ((_slim_codeattributes6).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << ("></iframe>".freeze); 
+      ; _slim_controls2 << ("<iframe"); _slim_codeattributes1 = (width); if _slim_codeattributes1; if _slim_codeattributes1 == true; _slim_controls2 << (" width"); else; _slim_controls2 << (" width=\""); _slim_controls2 << (_slim_codeattributes1); _slim_controls2 << ("\""); end; end; _slim_codeattributes2 = (height); if _slim_codeattributes2; if _slim_codeattributes2 == true; _slim_controls2 << (" height"); else; _slim_controls2 << (" height=\""); _slim_controls2 << (_slim_codeattributes2); _slim_controls2 << ("\""); end; end; _slim_codeattributes3 = src; if _slim_codeattributes3; if _slim_codeattributes3 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes3); _slim_controls2 << ("\""); end; end; _slim_codeattributes4 = 0; if _slim_codeattributes4; if _slim_codeattributes4 == true; _slim_controls2 << (" frameborder"); else; _slim_controls2 << (" frameborder=\""); _slim_controls2 << (_slim_codeattributes4); _slim_controls2 << ("\""); end; end; _slim_controls2 << (" webkitAllowFullScreen mozallowfullscreen allowFullScreen"); _slim_codeattributes5 = (option? 'autoplay'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _slim_controls2 << (" data-autoplay"); else; _slim_controls2 << (" data-autoplay=\""); _slim_controls2 << (_slim_codeattributes5); _slim_controls2 << ("\""); end; end; _slim_codeattributes6 = ((option? 'autoplay') ? "autoplay" : nil); if _slim_codeattributes6; if _slim_codeattributes6 == true; _slim_controls2 << (" allow"); else; _slim_controls2 << (" allow=\""); _slim_controls2 << (_slim_codeattributes6); _slim_controls2 << ("\""); end; end; _slim_controls2 << ("></iframe>"); 
       ; when 'youtube'; 
       ; unless (asset_uri_scheme = (attr :asset_uri_scheme, 'https')).empty?; 
       ; asset_uri_scheme = %(#{asset_uri_scheme}:); 
@@ -1721,14 +1721,14 @@ def convert_video(node, opts = {})
       ; 
       ; 
       ; 
-      ; _slim_controls2 << ("<iframe".freeze); _slim_codeattributes7 = (width); if _slim_codeattributes7; if _slim_codeattributes7 == true; _slim_controls2 << (" width".freeze); else; _slim_controls2 << (" width=\"".freeze); _slim_controls2 << ((_slim_codeattributes7).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes8 = (height); if _slim_codeattributes8; if _slim_codeattributes8 == true; _slim_controls2 << (" height".freeze); else; _slim_controls2 << (" height=\"".freeze); _slim_controls2 << ((_slim_codeattributes8).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes9 = src; if _slim_codeattributes9; if _slim_codeattributes9 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes9).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes10 = 0; if _slim_codeattributes10; if _slim_codeattributes10 == true; _slim_controls2 << (" frameborder".freeze); else; _slim_controls2 << (" frameborder=\"".freeze); _slim_controls2 << ((_slim_codeattributes10).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes11 = !(option? 'nofullscreen'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _slim_controls2 << (" allowfullscreen".freeze); else; _slim_controls2 << (" allowfullscreen=\"".freeze); _slim_controls2 << ((_slim_codeattributes11).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes12 = (option? 'autoplay'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _slim_controls2 << (" data-autoplay".freeze); else; _slim_controls2 << (" data-autoplay=\"".freeze); _slim_controls2 << ((_slim_codeattributes12).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes13 = ((option? 'autoplay') ? "autoplay" : nil); if _slim_codeattributes13; if _slim_codeattributes13 == true; _slim_controls2 << (" allow".freeze); else; _slim_controls2 << (" allow=\"".freeze); _slim_controls2 << ((_slim_codeattributes13).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << ("></iframe>".freeze); 
+      ; _slim_controls2 << ("<iframe"); _slim_codeattributes7 = (width); if _slim_codeattributes7; if _slim_codeattributes7 == true; _slim_controls2 << (" width"); else; _slim_controls2 << (" width=\""); _slim_controls2 << (_slim_codeattributes7); _slim_controls2 << ("\""); end; end; _slim_codeattributes8 = (height); if _slim_codeattributes8; if _slim_codeattributes8 == true; _slim_controls2 << (" height"); else; _slim_controls2 << (" height=\""); _slim_controls2 << (_slim_codeattributes8); _slim_controls2 << ("\""); end; end; _slim_codeattributes9 = src; if _slim_codeattributes9; if _slim_codeattributes9 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes9); _slim_controls2 << ("\""); end; end; _slim_codeattributes10 = 0; if _slim_codeattributes10; if _slim_codeattributes10 == true; _slim_controls2 << (" frameborder"); else; _slim_controls2 << (" frameborder=\""); _slim_controls2 << (_slim_codeattributes10); _slim_controls2 << ("\""); end; end; _slim_codeattributes11 = !(option? 'nofullscreen'); if _slim_codeattributes11; if _slim_codeattributes11 == true; _slim_controls2 << (" allowfullscreen"); else; _slim_controls2 << (" allowfullscreen=\""); _slim_controls2 << (_slim_codeattributes11); _slim_controls2 << ("\""); end; end; _slim_codeattributes12 = (option? 'autoplay'); if _slim_codeattributes12; if _slim_codeattributes12 == true; _slim_controls2 << (" data-autoplay"); else; _slim_controls2 << (" data-autoplay=\""); _slim_controls2 << (_slim_codeattributes12); _slim_controls2 << ("\""); end; end; _slim_codeattributes13 = ((option? 'autoplay') ? "autoplay" : nil); if _slim_codeattributes13; if _slim_codeattributes13 == true; _slim_controls2 << (" allow"); else; _slim_controls2 << (" allow=\""); _slim_controls2 << (_slim_codeattributes13); _slim_controls2 << ("\""); end; end; _slim_controls2 << ("></iframe>"); 
       ; else; 
       ; 
       ; 
       ; 
-      ; _slim_controls2 << ("<video".freeze); _slim_codeattributes14 = media_uri(attr :target); if _slim_codeattributes14; if _slim_codeattributes14 == true; _slim_controls2 << (" src".freeze); else; _slim_controls2 << (" src=\"".freeze); _slim_controls2 << ((_slim_codeattributes14).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes15 = (width); if _slim_codeattributes15; if _slim_codeattributes15 == true; _slim_controls2 << (" width".freeze); else; _slim_controls2 << (" width=\"".freeze); _slim_controls2 << ((_slim_codeattributes15).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes16 = (height); if _slim_codeattributes16; if _slim_codeattributes16 == true; _slim_controls2 << (" height".freeze); else; _slim_controls2 << (" height=\"".freeze); _slim_controls2 << ((_slim_codeattributes16).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes17 = ((attr :poster) ? media_uri(attr :poster) : nil); if _slim_codeattributes17; if _slim_codeattributes17 == true; _slim_controls2 << (" poster".freeze); else; _slim_controls2 << (" poster=\"".freeze); _slim_controls2 << ((_slim_codeattributes17).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes18 = (option? 'autoplay'); if _slim_codeattributes18; if _slim_codeattributes18 == true; _slim_controls2 << (" data-autoplay".freeze); else; _slim_controls2 << (" data-autoplay=\"".freeze); _slim_controls2 << ((_slim_codeattributes18).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes19 = !(option? 'nocontrols'); if _slim_codeattributes19; if _slim_codeattributes19 == true; _slim_controls2 << (" controls".freeze); else; _slim_controls2 << (" controls=\"".freeze); _slim_controls2 << ((_slim_codeattributes19).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_codeattributes20 = (option? 'loop'); if _slim_codeattributes20; if _slim_codeattributes20 == true; _slim_controls2 << (" loop".freeze); else; _slim_controls2 << (" loop=\"".freeze); _slim_controls2 << ((_slim_codeattributes20).to_s); _slim_controls2 << ("\"".freeze); end; end; _slim_controls2 << (">Your browser does not support the video tag.</video>".freeze); 
+      ; _slim_controls2 << ("<video"); _slim_codeattributes14 = media_uri(attr :target); if _slim_codeattributes14; if _slim_codeattributes14 == true; _slim_controls2 << (" src"); else; _slim_controls2 << (" src=\""); _slim_controls2 << (_slim_codeattributes14); _slim_controls2 << ("\""); end; end; _slim_codeattributes15 = (width); if _slim_codeattributes15; if _slim_codeattributes15 == true; _slim_controls2 << (" width"); else; _slim_controls2 << (" width=\""); _slim_controls2 << (_slim_codeattributes15); _slim_controls2 << ("\""); end; end; _slim_codeattributes16 = (height); if _slim_codeattributes16; if _slim_codeattributes16 == true; _slim_controls2 << (" height"); else; _slim_controls2 << (" height=\""); _slim_controls2 << (_slim_codeattributes16); _slim_controls2 << ("\""); end; end; _slim_codeattributes17 = ((attr :poster) ? media_uri(attr :poster) : nil); if _slim_codeattributes17; if _slim_codeattributes17 == true; _slim_controls2 << (" poster"); else; _slim_controls2 << (" poster=\""); _slim_controls2 << (_slim_codeattributes17); _slim_controls2 << ("\""); end; end; _slim_codeattributes18 = (option? 'autoplay'); if _slim_codeattributes18; if _slim_codeattributes18 == true; _slim_controls2 << (" data-autoplay"); else; _slim_controls2 << (" data-autoplay=\""); _slim_controls2 << (_slim_codeattributes18); _slim_controls2 << ("\""); end; end; _slim_codeattributes19 = !(option? 'nocontrols'); if _slim_codeattributes19; if _slim_codeattributes19 == true; _slim_controls2 << (" controls"); else; _slim_controls2 << (" controls=\""); _slim_controls2 << (_slim_codeattributes19); _slim_controls2 << ("\""); end; end; _slim_codeattributes20 = (option? 'loop'); if _slim_codeattributes20; if _slim_codeattributes20 == true; _slim_controls2 << (" loop"); else; _slim_controls2 << (" loop=\""); _slim_controls2 << (_slim_codeattributes20); _slim_controls2 << ("\""); end; end; _slim_controls2 << (">Your browser does not support the video tag.</video>"); 
       ; 
-      ; end; _slim_controls2; end; _buf << ((_slim_controls1).to_s); _buf
+      ; end; _slim_controls2 = _slim_controls2.join(""); end; _buf << (_slim_controls1); _buf = _buf.join("")
     end
   end
 
@@ -1736,7 +1736,7 @@ def convert_section(node, opts = {})
     node.extend(Helpers)
     node.instance_eval do
       converter.set_local_variables(binding, opts) unless opts.empty?
-      _buf = ''; 
+      _buf = []; 
       ; 
       ; titleless = (title = self.title) == '!'; 
       ; hide_title = (titleless || (option? :notitle) || (option? :conceal)); 
@@ -1779,12 +1779,12 @@ def convert_section(node, opts = {})
       ; content_for :footnotes do; 
       ; slide_footnotes = slide_footnotes(self); 
       ; if document.footnotes? && !(parent.attr? 'nofootnotes') && !slide_footnotes.empty?; 
-      ; _buf << ("<div class=\"footnotes\">".freeze); 
+      ; _buf << ("<div class=\"footnotes\">"); 
       ; slide_footnotes.each do |footnote|; 
-      ; _buf << ("<div class=\"footnote\">".freeze); 
-      ; _buf << (("#{footnote.index}. #{footnote.text}").to_s); 
+      ; _buf << ("<div class=\"footnote\">"); 
+      ; _buf << ("#{footnote.index}. #{footnote.text}"); 
       ; 
-      ; _buf << ("</div>".freeze); end; _buf << ("</div>".freeze); end; end; content_for :section do; 
+      ; _buf << ("</div>"); end; _buf << ("</div>"); end; end; content_for :section do; 
       ; 
       ; 
       ; 
@@ -1808,41 +1808,41 @@ def convert_section(node, opts = {})
       ; 
       ; 
       ; 
-      ; _buf << ("<section".freeze); _slim_codeattributes1 = (titleless ? nil : id); if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id".freeze); else; _buf << (" id=\"".freeze); _buf << ((_slim_codeattributes1).to_s); _buf << ("\"".freeze); end; end; _temple_html_attributeremover1 = ''; _slim_codeattributes2 = roles; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover1 << ((_slim_codeattributes2.join(" ")).to_s); else; _temple_html_attributeremover1 << ((_slim_codeattributes2).to_s); end; _temple_html_attributeremover1; if !_temple_html_attributeremover1.empty?; _buf << (" class=\"".freeze); _buf << ((_temple_html_attributeremover1).to_s); _buf << ("\"".freeze); end; _slim_codeattributes3 = (attr "background-gradient"); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-background-gradient".freeze); else; _buf << (" data-background-gradient=\"".freeze); _buf << ((_slim_codeattributes3).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes4 = (attr 'transition'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-transition".freeze); else; _buf << (" data-transition=\"".freeze); _buf << ((_slim_codeattributes4).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes5 = (attr 'transition-speed'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-transition-speed".freeze); else; _buf << (" data-transition-speed=\"".freeze); _buf << ((_slim_codeattributes5).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes6 = data_background_color; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-color".freeze); else; _buf << (" data-background-color=\"".freeze); _buf << ((_slim_codeattributes6).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes7 = data_background_image; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-image".freeze); else; _buf << (" data-background-image=\"".freeze); _buf << ((_slim_codeattributes7).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes8 = (data_background_size || attr('background-size')); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-size".freeze); else; _buf << (" data-background-size=\"".freeze); _buf << ((_slim_codeattributes8).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes9 = (data_background_repeat || attr('background-repeat')); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-repeat".freeze); else; _buf << (" data-background-repeat=\"".freeze); _buf << ((_slim_codeattributes9).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes10 = (data_background_transition || attr('background-transition')); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-transition".freeze); else; _buf << (" data-background-transition=\"".freeze); _buf << ((_slim_codeattributes10).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes11 = (data_background_position || attr('background-position')); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-position".freeze); else; _buf << (" data-background-position=\"".freeze); _buf << ((_slim_codeattributes11).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes12 = (attr "background-iframe"); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-iframe".freeze); else; _buf << (" data-background-iframe=\"".freeze); _buf << ((_slim_codeattributes12).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes13 = data_background_video; if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-video".freeze); else; _buf << (" data-background-video=\"".freeze); _buf << ((_slim_codeattributes13).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes14 = ((attr? 'background-video-loop') || (option? 'loop')); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-video-loop".freeze); else; _buf << (" data-background-video-loop=\"".freeze); _buf << ((_slim_codeattributes14).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes15 = ((attr? 'background-video-muted') || (option? 'muted')); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-video-muted".freeze); else; _buf << (" data-background-video-muted=\"".freeze); _buf << ((_slim_codeattributes15).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes16 = (attr "background-opacity"); if _slim_codeattributes16; if _slim_codeattributes16 == true; _buf << (" data-background-opacity".freeze); else; _buf << (" data-background-opacity=\"".freeze); _buf << ((_slim_codeattributes16).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes17 = (attr "autoslide"); if _slim_codeattributes17; if _slim_codeattributes17 == true; _buf << (" data-autoslide".freeze); else; _buf << (" data-autoslide=\"".freeze); _buf << ((_slim_codeattributes17).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes18 = (attr 'state'); if _slim_codeattributes18; if _slim_codeattributes18 == true; _buf << (" data-state".freeze); else; _buf << (" data-state=\"".freeze); _buf << ((_slim_codeattributes18).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes19 = ((attr? 'auto-animate') || (option? 'auto-animate')); if _slim_codeattributes19; if _slim_codeattributes19 == true; _buf << (" data-auto-animate".freeze); else; _buf << (" data-auto-animate=\"".freeze); _buf << ((_slim_codeattributes19).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes20 = ((attr 'auto-animate-easing') || (option? 'auto-animate-easing')); if _slim_codeattributes20; if _slim_codeattributes20 == true; _buf << (" data-auto-animate-easing".freeze); else; _buf << (" data-auto-animate-easing=\"".freeze); _buf << ((_slim_codeattributes20).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes21 = ((attr 'auto-animate-unmatched') || (option? 'auto-animate-unmatched')); if _slim_codeattributes21; if _slim_codeattributes21 == true; _buf << (" data-auto-animate-unmatched".freeze); else; _buf << (" data-auto-animate-unmatched=\"".freeze); _buf << ((_slim_codeattributes21).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes22 = ((attr 'auto-animate-duration') || (option? 'auto-animate-duration')); if _slim_codeattributes22; if _slim_codeattributes22 == true; _buf << (" data-auto-animate-duration".freeze); else; _buf << (" data-auto-animate-duration=\"".freeze); _buf << ((_slim_codeattributes22).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes23 = (attr 'auto-animate-id'); if _slim_codeattributes23; if _slim_codeattributes23 == true; _buf << (" data-auto-animate-id".freeze); else; _buf << (" data-auto-animate-id=\"".freeze); _buf << ((_slim_codeattributes23).to_s); _buf << ("\"".freeze); end; end; _slim_codeattributes24 = ((attr? 'auto-animate-restart') || (option? 'auto-animate-restart')); if _slim_codeattributes24; if _slim_codeattributes24 == true; _buf << (" data-auto-animate-restart".freeze); else; _buf << (" data-auto-animate-restart=\"".freeze); _buf << ((_slim_codeattributes24).to_s); _buf << ("\"".freeze); end; end; _buf << (">".freeze); 
+      ; _buf << ("<section"); _slim_codeattributes1 = (titleless ? nil : id); if _slim_codeattributes1; if _slim_codeattributes1 == true; _buf << (" id"); else; _buf << (" id=\""); _buf << (_slim_codeattributes1); _buf << ("\""); end; end; _temple_html_attributeremover1 = []; _slim_codeattributes2 = roles; if Array === _slim_codeattributes2; _slim_codeattributes2 = _slim_codeattributes2.flatten; _slim_codeattributes2.map!(&:to_s); _slim_codeattributes2.reject!(&:empty?); _temple_html_attributeremover1 << (_slim_codeattributes2.join(" ")); else; _temple_html_attributeremover1 << (_slim_codeattributes2); end; _temple_html_attributeremover1 = _temple_html_attributeremover1.join(""); if !_temple_html_attributeremover1.empty?; _buf << (" class=\""); _buf << (_temple_html_attributeremover1); _buf << ("\""); end; _slim_codeattributes3 = (attr "background-gradient"); if _slim_codeattributes3; if _slim_codeattributes3 == true; _buf << (" data-background-gradient"); else; _buf << (" data-background-gradient=\""); _buf << (_slim_codeattributes3); _buf << ("\""); end; end; _slim_codeattributes4 = (attr 'transition'); if _slim_codeattributes4; if _slim_codeattributes4 == true; _buf << (" data-transition"); else; _buf << (" data-transition=\""); _buf << (_slim_codeattributes4); _buf << ("\""); end; end; _slim_codeattributes5 = (attr 'transition-speed'); if _slim_codeattributes5; if _slim_codeattributes5 == true; _buf << (" data-transition-speed"); else; _buf << (" data-transition-speed=\""); _buf << (_slim_codeattributes5); _buf << ("\""); end; end; _slim_codeattributes6 = data_background_color; if _slim_codeattributes6; if _slim_codeattributes6 == true; _buf << (" data-background-color"); else; _buf << (" data-background-color=\""); _buf << (_slim_codeattributes6); _buf << ("\""); end; end; _slim_codeattributes7 = data_background_image; if _slim_codeattributes7; if _slim_codeattributes7 == true; _buf << (" data-background-image"); else; _buf << (" data-background-image=\""); _buf << (_slim_codeattributes7); _buf << ("\""); end; end; _slim_codeattributes8 = (data_background_size || attr('background-size')); if _slim_codeattributes8; if _slim_codeattributes8 == true; _buf << (" data-background-size"); else; _buf << (" data-background-size=\""); _buf << (_slim_codeattributes8); _buf << ("\""); end; end; _slim_codeattributes9 = (data_background_repeat || attr('background-repeat')); if _slim_codeattributes9; if _slim_codeattributes9 == true; _buf << (" data-background-repeat"); else; _buf << (" data-background-repeat=\""); _buf << (_slim_codeattributes9); _buf << ("\""); end; end; _slim_codeattributes10 = (data_background_transition || attr('background-transition')); if _slim_codeattributes10; if _slim_codeattributes10 == true; _buf << (" data-background-transition"); else; _buf << (" data-background-transition=\""); _buf << (_slim_codeattributes10); _buf << ("\""); end; end; _slim_codeattributes11 = (data_background_position || attr('background-position')); if _slim_codeattributes11; if _slim_codeattributes11 == true; _buf << (" data-background-position"); else; _buf << (" data-background-position=\""); _buf << (_slim_codeattributes11); _buf << ("\""); end; end; _slim_codeattributes12 = (attr "background-iframe"); if _slim_codeattributes12; if _slim_codeattributes12 == true; _buf << (" data-background-iframe"); else; _buf << (" data-background-iframe=\""); _buf << (_slim_codeattributes12); _buf << ("\""); end; end; _slim_codeattributes13 = data_background_video; if _slim_codeattributes13; if _slim_codeattributes13 == true; _buf << (" data-background-video"); else; _buf << (" data-background-video=\""); _buf << (_slim_codeattributes13); _buf << ("\""); end; end; _slim_codeattributes14 = ((attr? 'background-video-loop') || (option? 'loop')); if _slim_codeattributes14; if _slim_codeattributes14 == true; _buf << (" data-background-video-loop"); else; _buf << (" data-background-video-loop=\""); _buf << (_slim_codeattributes14); _buf << ("\""); end; end; _slim_codeattributes15 = ((attr? 'background-video-muted') || (option? 'muted')); if _slim_codeattributes15; if _slim_codeattributes15 == true; _buf << (" data-background-video-muted"); else; _buf << (" data-background-video-muted=\""); _buf << (_slim_codeattributes15); _buf << ("\""); end; end; _slim_codeattributes16 = (attr "background-opacity"); if _slim_codeattributes16; if _slim_codeattributes16 == true; _buf << (" data-background-opacity"); else; _buf << (" data-background-opacity=\""); _buf << (_slim_codeattributes16); _buf << ("\""); end; end; _slim_codeattributes17 = (attr "autoslide"); if _slim_codeattributes17; if _slim_codeattributes17 == true; _buf << (" data-autoslide"); else; _buf << (" data-autoslide=\""); _buf << (_slim_codeattributes17); _buf << ("\""); end; end; _slim_codeattributes18 = (attr 'state'); if _slim_codeattributes18; if _slim_codeattributes18 == true; _buf << (" data-state"); else; _buf << (" data-state=\""); _buf << (_slim_codeattributes18); _buf << ("\""); end; end; _slim_codeattributes19 = ((attr? 'auto-animate') || (option? 'auto-animate')); if _slim_codeattributes19; if _slim_codeattributes19 == true; _buf << (" data-auto-animate"); else; _buf << (" data-auto-animate=\""); _buf << (_slim_codeattributes19); _buf << ("\""); end; end; _slim_codeattributes20 = ((attr 'auto-animate-easing') || (option? 'auto-animate-easing')); if _slim_codeattributes20; if _slim_codeattributes20 == true; _buf << (" data-auto-animate-easing"); else; _buf << (" data-auto-animate-easing=\""); _buf << (_slim_codeattributes20); _buf << ("\""); end; end; _slim_codeattributes21 = ((attr 'auto-animate-unmatched') || (option? 'auto-animate-unmatched')); if _slim_codeattributes21; if _slim_codeattributes21 == true; _buf << (" data-auto-animate-unmatched"); else; _buf << (" data-auto-animate-unmatched=\""); _buf << (_slim_codeattributes21); _buf << ("\""); end; end; _slim_codeattributes22 = ((attr 'auto-animate-duration') || (option? 'auto-animate-duration')); if _slim_codeattributes22; if _slim_codeattributes22 == true; _buf << (" data-auto-animate-duration"); else; _buf << (" data-auto-animate-duration=\""); _buf << (_slim_codeattributes22); _buf << ("\""); end; end; _slim_codeattributes23 = (attr 'auto-animate-id'); if _slim_codeattributes23; if _slim_codeattributes23 == true; _buf << (" data-auto-animate-id"); else; _buf << (" data-auto-animate-id=\""); _buf << (_slim_codeattributes23); _buf << ("\""); end; end; _slim_codeattributes24 = ((attr? 'auto-animate-restart') || (option? 'auto-animate-restart')); if _slim_codeattributes24; if _slim_codeattributes24 == true; _buf << (" data-auto-animate-restart"); else; _buf << (" data-auto-animate-restart=\""); _buf << (_slim_codeattributes24); _buf << ("\""); end; end; _buf << (">"); 
       ; unless hide_title; 
-      ; _buf << ("<h2>".freeze); _buf << ((section_title).to_s); 
-      ; _buf << ("</h2>".freeze); end; if parent_section_with_vertical_slides; 
+      ; _buf << ("<h2>"); _buf << (section_title); 
+      ; _buf << ("</h2>"); end; if parent_section_with_vertical_slides; 
       ; unless (_blocks = blocks - vertical_slides).empty?; 
-      ; _buf << ("<div class=\"slide-content\">".freeze); 
+      ; _buf << ("<div class=\"slide-content\">"); 
       ; _blocks.each do |block|; 
-      ; _buf << ((block.convert).to_s); 
-      ; end; _buf << ("</div>".freeze); end; yield_content :footnotes; 
+      ; _buf << (block.convert); 
+      ; end; _buf << ("</div>"); end; yield_content :footnotes; 
       ; 
       ; else; 
       ; unless (_content = content.chomp).empty?; 
-      ; _buf << ("<div class=\"slide-content\">".freeze); 
-      ; _buf << ((_content).to_s); 
-      ; _buf << ("</div>".freeze); end; yield_content :footnotes; 
+      ; _buf << ("<div class=\"slide-content\">"); 
+      ; _buf << (_content); 
+      ; _buf << ("</div>"); end; yield_content :footnotes; 
       ; 
       ; end; clear_slide_footnotes; 
       ; 
-      ; _buf << ("</section>".freeze); 
+      ; _buf << ("</section>"); 
       ; 
       ; end; if parent_section_with_vertical_slides; 
-      ; _buf << ("<section>".freeze); 
+      ; _buf << ("<section>"); 
       ; yield_content :section; 
       ; vertical_slides.each do |subsection|; 
-      ; _buf << ((subsection.convert).to_s); 
+      ; _buf << (subsection.convert); 
       ; 
-      ; end; _buf << ("</section>".freeze); 
+      ; end; _buf << ("</section>"); 
       ; else; 
       ; if @level >= 3; 
       ; 
-      ; _slim_htag_filter1 = ((@level)).to_s; _buf << ("<h".freeze); _buf << ((_slim_htag_filter1).to_s); _buf << (">".freeze); _buf << ((title).to_s); 
-      ; _buf << ("</h".freeze); _buf << ((_slim_htag_filter1).to_s); _buf << (">".freeze); _buf << ((content.chomp).to_s); 
+      ; _slim_htag_filter1 = ((@level)).to_s; _buf << ("<h"); _buf << (_slim_htag_filter1); _buf << (">"); _buf << (title); 
+      ; _buf << ("</h"); _buf << (_slim_htag_filter1); _buf << (">"); _buf << (content.chomp); 
       ; else; 
       ; yield_content :section; 
-      ; end; end; _buf
+      ; end; end; _buf = _buf.join("")
     end
   end
   #------------------ End of generated transformation methods ------------------#
diff --git a/package-lock.json b/package-lock.json
index 55dcadc5..fef09466 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@asciidoctor/reveal.js",
-  "version": "5.0.1",
+  "version": "5.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@asciidoctor/reveal.js",
-      "version": "5.0.1",
+      "version": "5.1.0",
       "license": "MIT",
       "dependencies": {
         "@asciidoctor/cli": "~4.0",
@@ -19,11 +19,11 @@
         "@asciidoctor/core": "~3.0",
         "bestikk-log": "0.1.0",
         "expect.js": "0.3.1",
-        "pkg": "^4.4.2"
+        "pkg": "5.8.1"
       },
       "engines": {
-        "node": ">=8.11",
-        "npm": ">=5.0.0"
+        "node": ">=16",
+        "npm": ">=8.0.0"
       }
     },
     "node_modules/@asciidoctor/cli": {
@@ -70,10 +70,42 @@
         "node": ">=16"
       }
     },
+    "node_modules/@babel/generator": {
+      "version": "7.18.2",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.18.2.tgz",
+      "integrity": "sha512-W1lG5vUwFvfMd8HVXqdfbuG7RuaSrTCCD8cl8fP8wOivdbtbIg2Db3IWUcgvfxKbbn6ZBGYRW/Zk1MIwK49mgw==",
+      "dev": true,
+      "dependencies": {
+        "@babel/types": "^7.18.2",
+        "@jridgewell/gen-mapping": "^0.3.0",
+        "jsesc": "^2.5.1"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-string-parser": {
+      "version": "7.23.4",
+      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.23.4.tgz",
+      "integrity": "sha512-803gmbQdqwdf4olxrX4AJyFBV/RTr3rSmOj0rKwesmzlfhYNDEs+/iOcznzpNWlJlIlTJC2QfPFcHB6DlzdVLQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-validator-identifier": {
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.20.tgz",
+      "integrity": "sha512-Y4OZ+ytlatR8AI+8KZfKuL5urKp7qey08ha31L8b3BwewJAoJamTzyvxPR/5D+KkdJCGPq/+8TukHBlY10FX9A==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@babel/parser": {
-      "version": "7.13.12",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.13.12.tgz",
-      "integrity": "sha512-4T7Pb244rxH24yR116LAuJ+adxXXnHhZaLJjegJVKSdoNCe4x1eDBaud5YIcQFcqzsaD5BHvJw5BQ0AZapdCRw==",
+      "version": "7.18.4",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.18.4.tgz",
+      "integrity": "sha512-FDge0dFazETFcxGw/EXzOkN8uJp0PC7Qbm+Pe9T+av2zlBpOgunFHkQPPn+eRuClU73JF+98D531UgayY89tow==",
       "dev": true,
       "bin": {
         "parser": "bin/babel-parser.js"
@@ -82,22 +114,75 @@
         "node": ">=6.0.0"
       }
     },
-    "node_modules/@babel/runtime": {
-      "version": "7.13.10",
-      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.13.10.tgz",
-      "integrity": "sha512-4QPkjJq6Ns3V/RgpEahRk+AGfL0eO6RHHtTWoNNr5mO49G6B5+X6d6THgWEAvTrznU5xYpbAlVKRYcsCgh/Akw==",
+    "node_modules/@babel/types": {
+      "version": "7.19.0",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.19.0.tgz",
+      "integrity": "sha512-YuGopBq3ke25BVSiS6fgF49Ul9gH1x70Bcr6bqRLjWCkcX8Hre1/5+z+IiWOIerRMSSEfGZVB9z9kyq7wVs9YA==",
+      "dev": true,
+      "dependencies": {
+        "@babel/helper-string-parser": "^7.18.10",
+        "@babel/helper-validator-identifier": "^7.18.6",
+        "to-fast-properties": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@jridgewell/gen-mapping": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.3.tgz",
+      "integrity": "sha512-HLhSWOLRi875zjjMG/r+Nv0oCW8umGb0BgEhyX3dDX3egwZtB8PqLnjz3yedt8R5StBrzcg4aBpnh8UA9D1BoQ==",
+      "dev": true,
+      "dependencies": {
+        "@jridgewell/set-array": "^1.0.1",
+        "@jridgewell/sourcemap-codec": "^1.4.10",
+        "@jridgewell/trace-mapping": "^0.3.9"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.1.tgz",
+      "integrity": "sha512-dSYZh7HhCDtCKm4QakX0xFpsRDqjjtZf/kjI/v3T3Nwt5r8/qz/M19F9ySyOqU94SXBmeG9ttTul+YnR4LOxFA==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/set-array": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/set-array/-/set-array-1.1.2.tgz",
+      "integrity": "sha512-xnkseuNADM0gt2bs+BvhO0p78Mk762YnZdsuzFV018NoG1Sj1SCQvpSqa7XUaTam5vAGasABV9qXASMKnFMwMw==",
+      "dev": true,
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@jridgewell/sourcemap-codec": {
+      "version": "1.4.15",
+      "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.4.15.tgz",
+      "integrity": "sha512-eF2rxCRulEKXHTRiDrDy6erMYWqNw4LPdQ8UQA4huuxaQsVeRPFl2oM8oDGxMFhJUWZf9McpLtJasDDZb/Bpeg==",
+      "dev": true
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.20",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.20.tgz",
+      "integrity": "sha512-R8LcPeWZol2zR8mmH3JeKQ6QRCFb7XgUhV9ZlGhHLGyg4wpPiPZNQOOWhFZhxKw8u//yTbNGI42Bx/3paXEQ+Q==",
       "dev": true,
       "dependencies": {
-        "regenerator-runtime": "^0.13.4"
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
     "node_modules/@nodelib/fs.scandir": {
-      "version": "2.1.3",
-      "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz",
-      "integrity": "sha512-eGmwYQn3gxo4r7jdQnkrrN6bY478C3P+a/y72IJukF8LjB6ZHeB3c+Ehacj3sYeSmUXGlnA67/PmbM9CVwL7Dw==",
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
+      "integrity": "sha512-vq24Bq3ym5HEQm2NKCr3yXDwjc7vTsEThRDnkp2DK9p1uqLR+DHurm/NOTo0KG7HYHU7eppKZj3MyqYuMBf62g==",
       "dev": true,
       "dependencies": {
-        "@nodelib/fs.stat": "2.0.3",
+        "@nodelib/fs.stat": "2.0.5",
         "run-parallel": "^1.1.9"
       },
       "engines": {
@@ -105,21 +190,21 @@
       }
     },
     "node_modules/@nodelib/fs.stat": {
-      "version": "2.0.3",
-      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.3.tgz",
-      "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA==",
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.5.tgz",
+      "integrity": "sha512-RkhPPp2zrqDAQA/2jNhnztcPAlv64XdhIp7a7454A5ovI7Bukxgt7MX7udwAu3zg1DcpPU0rz3VV1SeaqvY4+A==",
       "dev": true,
       "engines": {
         "node": ">= 8"
       }
     },
     "node_modules/@nodelib/fs.walk": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.4.tgz",
-      "integrity": "sha512-1V9XOY4rDW0rehzbrcqAmHnz8e7SKvX27gh8Gt2WgB0+pdzdiLV83p72kZPU+jvMbS1qU5mauP2iOvO8rhmurQ==",
+      "version": "1.2.8",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.8.tgz",
+      "integrity": "sha512-oGB+UxlgWcgQkgwo8GcEGwemoTFt3FIO9ababBmaGwXIoBKZ+GTy0pP185beGg7Llih/NSHSV2XAs1lnznocSg==",
       "dev": true,
       "dependencies": {
-        "@nodelib/fs.scandir": "2.1.3",
+        "@nodelib/fs.scandir": "2.1.5",
         "fastq": "^1.6.0"
       },
       "engines": {
@@ -131,20 +216,16 @@
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
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-      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.1.tgz",
+      "integrity": "sha512-gptHNQghINnc/vTGIk0SOFGFNXw7JVrlRUtConJRlvaw6DuX0wO5Jeko9sWrMBhh+PsYAZ7oXAiOnf/UKogyiw==",
       "dev": true,
       "engines": {
-        "node": ">= 4.0.0"
+        "node": ">= 10.0.0"
       }
     },
     "node_modules/unxhr": {
@@ -1954,70 +1578,26 @@
         "node": ">=8.11"
       }
     },
-    "node_modules/uri-js": {
-      "version": "4.4.1",
-      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
-      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
-      "dev": true,
-      "dependencies": {
-        "punycode": "^2.1.0"
-      }
-    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
       "dev": true
     },
-    "node_modules/uuid": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
-      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
-      "deprecated": "Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.",
-      "dev": true,
-      "bin": {
-        "uuid": "bin/uuid"
-      }
-    },
-    "node_modules/verror": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
-      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
-      "dev": true,
-      "engines": [
-        "node >=0.6.0"
-      ],
-      "dependencies": {
-        "assert-plus": "^1.0.0",
-        "core-util-is": "1.0.2",
-        "extsprintf": "^1.2.0"
-      }
-    },
-    "node_modules/which-pm-runs": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/which-pm-runs/-/which-pm-runs-1.1.0.tgz",
-      "integrity": "sha512-n1brCuqClxfFfq/Rb0ICg9giSZqCS+pLtccdag6C2HyufBrh3fBOiy9nb6ggRMvWOVH5GrdJskj5iGTZNxd7SA==",
-      "dev": true,
-      "engines": {
-        "node": ">=4"
-      }
+    "node_modules/webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "dev": true
     },
-    "node_modules/wide-align": {
-      "version": "1.1.5",
-      "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.5.tgz",
-      "integrity": "sha512-eDMORYaPNZ4sQIuuYPDHdQvf4gyCF9rEEV/yPxGfwPkRodwEgiMUUXTx/dex+Me0wxx53S+NgUHaP7y3MGlDmg==",
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
       "dev": true,
       "dependencies": {
-        "string-width": "^1.0.2 || 2 || 3 || 4"
-      }
-    },
-    "node_modules/word-wrap": {
-      "version": "1.2.5",
-      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
-      "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.10.0"
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
       }
     },
     "node_modules/wrap-ansi": {
@@ -2049,6 +1629,12 @@
         "node": ">=10"
       }
     },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "dev": true
+    },
     "node_modules/yargs": {
       "version": "17.3.1",
       "resolved": "https://registry.npmjs.org/yargs/-/yargs-17.3.1.tgz",
diff --git a/package.json b/package.json
index e9641000..625052ca 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,7 @@
     "release:description": "node npm/release/description.js",
     "release:prepare": "node npm/release/prepare.js",
     "release:next": "node npm/release/next.js",
-    "package": "npm i @asciidoctor/core && pkg -t node12-linux-x64,node12-macos-x64,node12-win-x64 package.json --out-path dist/"
+    "package": "npm i @asciidoctor/core && pkg -t node16-linux-x64,node16-macos-x64,node16-win-x64 package.json --out-path dist/"
   },
   "repository": {
     "type": "git",
@@ -55,7 +55,7 @@
     "@asciidoctor/core": "~3.0",
     "bestikk-log": "0.1.0",
     "expect.js": "0.3.1",
-    "pkg": "^4.4.2"
+    "pkg": "5.8.1"
   },
   "volta": {
     "node": "16.20.1"