anchor.diff:    styleCrossedOut
   ];
   
  +/// All of the [AnsiCode] values that represent [AnsiCodeType.foreground].
   const List<AnsiCode> foregroundColors = const [
     black,
     red,
  
positive.code: // Copyright 2017, 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.
  
  // TODO(kevmoo) provide library documentation.
  library ansi_code;
  
  import 'dart:async';
  import 'dart:io' as io;
  
negative.code:   white
  ];
  
  /// All of the [AnsiCode] values that represent [AnsiCodeType.background].
  const List<AnsiCode> backgroundColors = const [
    backgroundBlack,
    backgroundRed,
  