# File lib/sinatra/respond_with.rb, line 193
    def remap_extensions
      ext_map.clear
      Rack::Mime::MIME_TYPES.each { |e,t| ext_map[t] << e[1..-1].to_sym }
      ext_map['text/javascript'] << 'js'
      ext_map['text/xml'] << 'xml'
    end