Update grammar (joomla#10778)

robots.txt.dist

@@ -1,9 +1,12 @@
-# If the Joomla site is installed within a folder such as at
-# e.g. www.example.com/joomla/ the robots.txt file MUST be
-# moved to the site root at e.g. www.example.com/robots.txt
-# AND the joomla folder name MUST be prefixed to the disallowed
-# path, e.g. the Disallow rule for the /administrator/ folder
-# MUST be changed to read Disallow: /joomla/administrator/
+# If the Joomla site is installed within a folder 
+# eg www.example.com/joomla/ then the robots.txt file 
+# MUST be moved to the site root 
+# eg www.example.com/robots.txt
+# AND the joomla folder name MUST be prefixed to all of the
+# paths. 
+# eg the Disallow rule for the /administrator/ folder MUST 
+# be changed to read 
+# Disallow: /joomla/administrator/
 #
 # For more information about the robots.txt standard, see:
 # http://www.robotstxt.org/orig.html