railties/lib/rails/generators/rails/app/templates/app/views/layouts/application.html.erb.tt

<!DOCTYPE html>
<html>
<head>
  <title><%= camelized %></title>
  <%- if options[:skip_javascript] -%>
  <%%= stylesheet_link_tag    'application', media: 'all' %>
  <%- else -%>
    <%- if gemfile_entries.any? { |m| m.name == 'turbolinks' } -%>
  <%%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
  <%%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
    <%- else -%>
  <%%= stylesheet_link_tag    'application', media: 'all' %>
  <%%= javascript_include_tag 'application' %>
    <%- end -%>
  <%- end -%>
  <%%= csrf_meta_tags %>
</head>
<body>

<%%= yield %>

</body>
</html>