socialforge/app/views/repositories/_change_diff.html.erb

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<table class="filecontent syntaxhl">
  <tbody>
  <% diff = ActiveSupport::JSON.decode(change.to_json) %>
  <% diff = OpenStruct.new(diff) %>
  <% @diff_file = Trustie::Gitlab::Diff::File.new(diff) %>
  <% @diff_file.diff_lines.each_with_index do |line, index| %>
      <% type = line.type %>
      <% last_line = line.new_pos.to_s %>
      <% line_old = line.old_pos.to_s %>

      <% if type.nil? || type == "match" %>
          <tr class="line_holder" >
            <td class="old_line">
              <a><%= type == "match" ? "..." : line_old.center(4) %></a>
            </td>
            <td class="new_line" >
              <a><%= type == "match" ? "..." : last_line.center(4) %></a>
            </td>
            <td class="line_content noteable_line <%= 'c_grey' if type == "match" %>" >
              <pre style="width:auto;overflow: auto; "><%= Redmine::CodesetUtil.replace_invalid_utf8(line.text).html_safe %></pre>
            </td>
          </tr>
      <% else %>
          <% old_line = type == 'new' ? ' '*4: line_old %>
          <% new_line = type == 'old' ? ' '*4: last_line %>
          <tr class="<%= type == 'old' ? 'line_holder old' : 'line_holder new' %>" >
            <td class="old_line">
              <a><%= old_line.to_s.center(4) %></a>
            </td>
            <td class="new_line" data-linenumber="2">
              <a><%= new_line.to_s.center(4) %></a>
            </td>
            <td class="<%= type == 'old' ? 'line_content noteable_line old' : 'line_content new noteable_line' %> " >
              <pre style="width:auto;overflow: auto; "><%= Redmine::CodesetUtil.replace_invalid_utf8(line.text).html_safe %></pre>
            </td>
          </tr>
      <% end %>
  <% end %>
  <tr>
    <td class=" old_line " data-linenumber="5">
      ...
    </td>
    <td class="new_line " data-linenumber="5">
      ...
    </td>
    <td class="line_content "></td>
  </tr>
  </tbody>
</table>