redmine/app/views/common/_diff.html.erb

<% diff = Redmine::UnifiedDiff.new(
            diff, :type => diff_type,
            :max_lines => Setting.diff_max_lines_displayed.to_i,
            :style => diff_style) -%>

<% diff.each do |table_file| -%>
<div class="autoscroll">
<% if diff.diff_type == 'sbs' -%>
<table class="filecontent">
<thead>
<tr>
  <th colspan="4" class="filename">
    <% if table_file.previous_file_name %>
      <span class="previous-filename"><%= table_file.previous_file_name %> →</span>
    <% end %>
    <%= table_file.file_name %>
  </th>
</tr>
</thead>
<tbody>
<% table_file.each_line do |spacing, line| -%>
<% if spacing -%>
<tr class="spacing">
  <th class="line-num">...</th><td></td><th class="line-num">...</th><td></td>
</tr>
<% end -%>
<tr>
  <th class="line-num"><%= line.nb_line_left %></th>
  <td class="line-code <%= line.type_diff_left %>">
    <pre><%= line.html_line_left.html_safe %></pre>
  </td>
  <th class="line-num"><%= line.nb_line_right %></th>
  <td class="line-code <%= line.type_diff_right %>">
    <pre><%= line.html_line_right.html_safe %></pre>
  </td>
</tr>
<% end -%>
</tbody>
</table>

<% else -%>
<table class="filecontent">
<thead>
  <tr>
    <th colspan="3" class="filename">
      <% if table_file.previous_file_name %>
        <span class="previous-filename"><%= table_file.previous_file_name %> →</span>
      <% end %>
      <%= table_file.file_name %>
    </th>
  </tr>
</thead>
<tbody>
<% table_file.each_line do |spacing, line| %>
<% if spacing -%>
<tr class="spacing">
  <th class="line-num">...</th><th class="line-num">...</th><td></td>
</tr>
<% end -%>
<tr>
  <th class="line-num"><%= line.nb_line_left %></th>
  <th class="line-num"><%= line.nb_line_right %></th>
  <td class="line-code <%= line.type_diff %>">
    <pre><%= line.html_line.html_safe %></pre>
  </td>
</tr>
<% end -%>
</tbody>
</table>
<% end -%>
</div>
<% end -%>

<%= l(:text_diff_truncated) if diff.truncated? %>