anchor.diff:    FileSystemStateTestView _testView;
   
     FileSystemState(
  -      this._logger,
  -      this._byteStore,
  -      this._contentOverlay,
  -      this._resourceProvider,
  -      this._sourceFactory,
  -      this._analysisOptions,
  -      this._salt,
  -      {this.externalSummaries,
  -      this.parseExceptionHandler}) {
  +    this._logger,
  +    this._byteStore,
  +    this._contentOverlay,
  +    this._resourceProvider,
  +    this._sourceFactory,
  +    this._analysisOptions,
  +    this._salt, {
  +    this.externalSummaries,
  +    this.parseExceptionHandler,
  +  }) {
       _fileContentCache =
           _FileContentCache.getInstance(_resourceProvider, _contentOverlay);
       _testView = new FileSystemStateTestView(this);
  
positive.code:       fileStamp++;
      }
      files.add(file);
    }
  }
  
  
negative.code:         return file;
        }
        // Create a new file.
        FileSource uriSource = new FileSource(resource, uri);
        file = new FileState._(
            this, path, uri, _absolutePathToFileUri(path), uriSource);
        _uriToFile[uri] = file;
        _addFileWithPath(path, file);
        _pathToCanonicalFile[path] = file;
  