anchor.diff:          // Mongo updates test
           app.get("/updates-mongo").listen((request) {
             var queries = _parseQueriesParam(request.param("queries"));
  -          
  +
  +          _setJsonHeaders(request.response);
  +
             Future.wait(new List.generate(queries, (index) {
               return _mongoQuery()
                   .then((world) {
  
positive.code:         
          // Mongo fortunes test
          app.get("/fortunes-mongo").listen((request) {
            print("works");
            _setHtmlHeaders(request.response);
            _fortuneCollection.find().toList().then((fortunes) {
              fortunes = fortunes.map((fortune) {
                return new Fortune(fortune["id"], fortune["message"]);
  
negative.code:         app.get("/queries-mongo").listen((request) {
            
            var queries = _parseQueriesParam(request.param("queries"));
  
            _setJsonHeaders(request.response);
            
            Future.wait(
                new List.generate(
  