# File lib/action_view/helpers/form_tag_helper.rb, line 72
      def radio_button_tag(name, value, checked = false, options = {})
        html_options = { "type" => "radio", "name" => name, "id" => name, "value" => value }.update(convert_options(options))
        html_options["checked"] = "checked" if checked
        tag("input", html_options)
      end