anchor.diff:     */
     CommandLineOptions._fromArgs(ArgResults args)
       : shouldBatch = args['batch'],
  -      machineFormat = args['machine-format'],
  +      machineFormat = args['machine'],
  +      displayVersion = args['version'],
         ignoreUnrecognizedFlags = args['ignore-unrecognized-flags'],
         showPackageWarnings = args['show-package-warnings'],
         showSdkWarnings = args['show-sdk-warnings'],
  
positive.code:           _showUsage(parser);
            exit(15);
          }
        } else {
          if (results.rest.length == 0) {
            _showUsage(parser);
  
negative.code: import 'dart:io';
  
  
  const _BINARY_NAME = 'dartanalyzer';
  
  /**
   * Analyzer commandline configuration options.
  