only show diff unfolding link if there are more lines to show

app/views/projects/blob/diff.html.haml

@@ -25,6 +25,6 @@
           = link_to raw(line_new), "##{line_new}"
         = line_content
-  - if @form.unfold? && @form.bottom? && @form.to < @blob.loc
+  - if @form.unfold? && @form.bottom? && @form.to < @blob.lines.size
     %tr.line_holder{ id: @form.to, class: line_class }
       = diff_match_line @form.to - @form.offset, @form.to, text: @match_line, view: diff_view, bottom: true

app/views/projects/diffs/_content.html.haml

@@ -15,10 +15,11 @@
         %a.click-to-expand
           Click to expand it.
     - elsif diff_file.diff_lines.length > 0
+      - total_lines = blob.lines.last.chomp == '' ? blob.lines.size - 1 : blob.lines.size
       - if diff_view == :parallel
-        = render "projects/diffs/parallel_view", diff_file: diff_file, project: project, blob: blob
+        = render "projects/diffs/parallel_view", diff_file: diff_file, total_lines: total_lines
       - else
-        = render "projects/diffs/text_file", diff_file: diff_file
+        = render "projects/diffs/text_file", diff_file: diff_file, total_lines: total_lines
     - else
       - if diff_file.mode_changed?
         .nothing-here-block File mode changed

app/views/projects/diffs/_parallel_view.html.haml

@@ -45,5 +45,6 @@
           = render "discussions/parallel_diff_discussion", discussion_left: discussion_left, discussion_right: discussion_right
     - if !diff_file.new_file && diff_file.diff_lines.any?
       - last_line = diff_file.diff_lines.last
-      %tr.line_holder.parallel
-        = diff_match_line last_line.old_pos, last_line.new_pos, bottom: true, view: :parallel
+      - if last_line.new_pos < total_lines
+        %tr.line_holder.parallel
+          = diff_match_line last_line.old_pos, last_line.new_pos, bottom: true, view: :parallel

app/views/projects/diffs/_text_file.html.haml

@@ -12,5 +12,6 @@
   - if !diff_file.new_file && diff_file.highlighted_diff_lines.any?
     - last_line = diff_file.highlighted_diff_lines.last
-    %tr.line_holder
-      = diff_match_line last_line.old_pos, last_line.new_pos, bottom: true
+    - if last_line.new_pos < total_lines
+      %tr.line_holder
+        = diff_match_line last_line.old_pos, last_line.new_pos, bottom: true