anchor.diff:    final bool strongMode;
   
     const Outline(this.fullCompile, this.astKind, this.strongMode,
  -      {this.updateExpectations: false});
  -
  -  final bool updateExpectations;
  +      {this.updateComments: false});
  +
  +  final bool updateComments;
   
     String get name {
       return fullCompile ? "${astKind} compile" : "outline";
  
positive.code: 
    Future<Program> platform;
  
    FastaContext(this.vm, bool strongMode, bool updateExpectations,
        this.uriTranslator, bool fullCompile, AstKind astKind)
        : steps = <Step>[
            new Outline(fullCompile, astKind, strongMode,
                updateExpectations: updateExpectations),
            const Print(),
            new Verify(fullCompile),
            new MatchExpectation(
  
negative.code:     TranslateUri uriTranslator = await TranslateUri.parse(packages);
      bool strongMode = environment.containsKey(STRONG_MODE);
      bool updateExpectations = environment["updateExpectations"] == "true";
      bool updateComments = environment["updateComments"] == "true";
      String astKindString = environment[AST_KIND_INDEX];
      AstKind astKind =
          astKindString == null ? null : AstKind.values[int.parse(astKindString)];
      return new FastaContext(vm, strongMode, updateExpectations, updateComments,
          uriTranslator, environment.containsKey(ENABLE_FULL_COMPILE), astKind);
    }
  }
  
  