anchor.diff:  # conflicts_with 'dart-editor-edge', :because => 'installation of dart-dsk tools in path'
   # conflicts_with 'dart-editor-edge-cs', :because => 'installation of dart-dsk tools in path'
   # conflicts_with 'dart-editor-stable', :because => 'installation of dart-dsk tools in path'
  -''' + dart_install_section)
  +''' + dart_install_section, "[Changes](http://storage.googleapis.com/dart-archive/channels/dev/release/latest/changelog.html)")
       .catchError((e) {
           print("DartEditorDev: ${e} ${e.stackTrace}");     // Finally, callback fires.
           return -1;
  
positive.code:     .then((_) => writeCask(outputDirectory, "DartContentShellStable", "dart-content-shell-stable.rb", client, stable_root_url, "dartium/content_shell-macos-ia32-release.zip",  '''
  # conflicts_with 'dart-content-shell-dev', :because => 'installation of dart-dsk tools in path'
  # conflicts_with 'dart-content-shell-edge', :because => 'installation of dart-dsk tools in path'
          ''' + cs_install_section))
      .catchError((e) {
          print("DartContentShellStable: ${e} ${e.stackTrace}");     // Finally, callback fires.
          return -1;
  
negative.code: # conflicts_with 'dart-editor-dev', :because => 'installation of dart-dsk tools in path'
  # conflicts_with 'dart-editor-edge', :because => 'installation of dart-dsk tools in path'
  # conflicts_with 'dart-editor-edge-cs', :because => 'installation of dart-dsk tools in path'
          ''' + dart_install_section, "[Changes](http://storage.googleapis.com/dart-archive/channels/stable/release/latest/changelog.html)"))
      .catchError((e) {
          print("DartEditorStable: ${e} ${e.stackTrace}");     // Finally, callback fires.
          return -1;
  