anchor.diff:  
       }
   
  -    return new Future.value(feature);
  +    return feature;
     }
   }
positive.code:    * which is a List of lines.
     */
    Future<Feature> execute() {
      LoggerFactory.config[".*"].debugEnabled = false; // TODO key off options
  
      Feature feature;
  
negative.code:   GherkinSyntaxError(String msg) : super(msg);
  }
  
  class GherkinParserTask implements Task {
  
    List<String> contents;
  