# File lib/action_view/helpers/asset_tag_helper.rb, line 539
      def favicon_link_tag(source='/favicon.ico', options={})
        tag('link', {
          :rel  => 'shortcut icon',
          :type => 'image/vnd.microsoft.icon',
          :href => path_to_image(source)
        }.merge(options.symbolize_keys))
      end