_normalize_options

# File actionpack/lib/abstract_controller/layouts.rb, line 290
    def _normalize_options(options)
      super

      if _include_layout?(options)
        layout = options.key?(:layout) ? options.delete(:layout) : :default
        value = _layout_for_option(layout)
        options[:layout] = (value =~ /\blayouts/ ? value : "layouts/#{value}") if value
      end
    end