anchor.diff:            _showUsage(parser);
             exit(15);
           }
  +      } if (results['version']) {
  +        print('$_BINARY_NAME version ${_getVersion()}');
  +        exit(0);
         } else {
           if (results.rest.length == 0) {
             _showUsage(parser);
  
positive.code:   /** Whether to use machine format for error display */
    final bool machineFormat;
  
    /** Whether to ignore unrecognized flags */
    final bool ignoreUnrecognizedFlags;
  
  
negative.code: import 'dart:io';
  
  
  const _BINARY_NAME = 'dartanalyzer';
  
  /**
   * Analyzer commandline configuration options.
  