diff --git a/src/display/inline.rs b/src/display/inline.rs
index d334be0405..eae6d4f590 100644
--- a/src/display/inline.rs
+++ b/src/display/inline.rs
@@ -65,7 +65,7 @@ pub fn print(
             "{}",
             style::header(
                 display_path,
-                extra_info,
+                extra_info.as_ref(),
                 i + 1,
                 hunks.len(),
                 file_format,
diff --git a/src/display/side_by_side.rs b/src/display/side_by_side.rs
index e0a5102497..30372a6215 100644
--- a/src/display/side_by_side.rs
+++ b/src/display/side_by_side.rs
@@ -67,7 +67,7 @@ fn format_missing_line_num(
 /// Display `src` in a single column (e.g. a file removal or addition).
 fn display_single_column(
     display_path: &str,
-    old_path: &Option<String>,
+    old_path: Option<&String>,
     file_format: &FileFormat,
     src_lines: &[String],
     side: Side,
@@ -320,7 +320,7 @@ pub fn print(
     hunks: &[Hunk],
     display_options: &DisplayOptions,
     display_path: &str,
-    old_path: &Option<String>,
+    old_path: Option<&String>,
     file_format: &FileFormat,
     lhs_src: &str,
     rhs_src: &str,
@@ -667,7 +667,7 @@ mod tests {
         // Basic smoke test.
         let res_lines = display_single_column(
             "foo.py",
-            &None,
+            None,
             &FileFormat::SupportedLanguage(Language::Python),
             &["print(123)\n".to_string()],
             Side::Right,
@@ -724,7 +724,7 @@ mod tests {
             &hunks,
             &DisplayOptions::default(),
             "foo-new.el",
-            &None,
+            None,
             &FileFormat::SupportedLanguage(Language::EmacsLisp),
             "foo",
             "bar",
diff --git a/src/display/style.rs b/src/display/style.rs
index 9ecfca0713..47c9ab8437 100644
--- a/src/display/style.rs
+++ b/src/display/style.rs
@@ -451,7 +451,7 @@ pub(crate) fn apply_line_number_color(
 
 pub fn header(
     display_path: &str,
-    extra_info: &Option<String>,
+    extra_info: Option<&String>,
     hunk_num: usize,
     hunk_total: usize,
     file_format: &FileFormat,
diff --git a/src/main.rs b/src/main.rs
index 2c3e810585..20920dc7b6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -704,7 +704,7 @@ fn print_diff_result(display_options: &DisplayOptions, summary: &DiffResult) {
                         "{}",
                         display::style::header(
                             &summary.display_path,
-                            &summary.extra_info,
+                            summary.extra_info.as_ref(),
                             1,
                             1,
                             &summary.file_format,
@@ -731,7 +731,7 @@ fn print_diff_result(display_options: &DisplayOptions, summary: &DiffResult) {
                     "{}",
                     display::style::header(
                         &summary.display_path,
-                        &summary.extra_info,
+                        summary.extra_info.as_ref(),
                         1,
                         1,
                         &summary.file_format,
@@ -769,7 +769,7 @@ fn print_diff_result(display_options: &DisplayOptions, summary: &DiffResult) {
                         hunks,
                         display_options,
                         &summary.display_path,
-                        &summary.extra_info,
+                        summary.extra_info.as_ref(),
                         &summary.file_format,
                         lhs_src,
                         rhs_src,
@@ -785,7 +785,7 @@ fn print_diff_result(display_options: &DisplayOptions, summary: &DiffResult) {
                     "{}",
                     display::style::header(
                         &summary.display_path,
-                        &summary.extra_info,
+                        summary.extra_info.as_ref(),
                         1,
                         1,
                         &FileFormat::Binary,
@@ -806,7 +806,7 @@ fn print_diff_result(display_options: &DisplayOptions, summary: &DiffResult) {
                 "{}",
                 display::style::header(
                     &summary.display_path,
-                    &summary.extra_info,
+                    summary.extra_info.as_ref(),
                     1,
                     1,
                     &FileFormat::Binary,