anchor.diff:  /// Creates [file] and writes [contents] to it.
   String writeBinaryFile(String file, List<int> contents) {
     log.io("Writing ${contents.length} bytes to binary file $file.");
  -  new File(file).openSync(FileMode.WRITE)
  +  new File(file).openSync(mode: FileMode.WRITE)
         ..writeListSync(contents, 0, contents.length)
         ..closeSync();
     log.fine("Wrote text file $file.");
  
positive.code: // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
  // for details. All rights reserved. Use of this source code is governed by a
  // BSD-style license that can be found in the LICENSE file.
  
  
negative.code: 
  /// Reads the contents of the text file [file].
  String readTextFile(String file) =>
      new File(file).readAsStringSync(encoding: Encoding.UTF_8);
  
  /// Reads the contents of the binary file [file].
  List<int> readBinaryFile(String file) {
  