lib/rdoc/generator/template/rails/file.rhtml

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="<%= @options.charset %>">
    <title><%= page_title file.name %></title>
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <%= include_template '_head.rhtml', {:context => file, :tree_keys => [] } %>

    <meta property="og:title" value="<%= og_title file.name %>">
</head>

<body>
    <a class="sr-only sr-only-focusable" href="#context" data-turbo="false">Skip to Content</a>
    <a class="sr-only sr-only-focusable" href="#search" data-turbo="false">Skip to Search</a>

    <%= include_template '_panel.rhtml' %>

    <main id="content">
        <h1 class="content__full-name">
          <span class="qualifier">File</span>
          <%= full_name file %>
        </h1>

        <% if source_url = github_url(file.relative_name) %>
          <p><%= link_to_external "View on GitHub", source_url %></p>
        <% end %>

        <%= include_template '_context.rhtml', {:context => file} %>
    </main>
  </body>
</html>