Redmine/app/views/repositories/diff.html.erb

<h2><%= l(:label_revision) %> <%= @diff_format_revisions %> <%=h @path %></h2>

<!-- Choose view type -->
<% form_tag({:path => to_path_param(@path)}, :method => 'get') do %>
  <%= hidden_field_tag('rev', params[:rev]) if params[:rev] %>
  <%= hidden_field_tag('rev_to', params[:rev_to]) if params[:rev_to] %>
  <p>
    <label><%= l(:label_view_diff) %></label>
    <%= select_tag 'type',
                    options_for_select(
                      [[l(:label_diff_inline), "inline"], [l(:label_diff_side_by_side), "sbs"]], @diff_type),
                    :onchange => "if (this.value != '') {this.form.submit()}" %>
  </p>
<% end %>

<% cache(@cache_key) do -%>
<%= render :partial => 'common/diff', :locals => {:diff => @diff, :diff_type => @diff_type} %>
<% end -%>

<% other_formats_links do |f| %>
  <%= f.link_to 'Diff', :url => params, :caption => 'Unified diff' %>
<% end %>

<% html_title(with_leading_slash(@path), 'Diff') -%>

<% content_for :header_tags do %>
<%= stylesheet_link_tag "scm" %>
<% end %>