# File lib/sprockets/asset_attributes.rb, line 94
    def content_type
      @content_type ||= begin
        if format_extension.nil?
          engine_content_type || 'application/octet-stream'
        else
          @environment.mime_types(format_extension) ||
            engine_content_type ||
            'application/octet-stream'
        end
      end
    end