anchor.diff:  class CreateCommand extends Command {
     final String name = 'create';
     final String description = 'Create a new Flutter project.';
  +  final List<String> aliases = <String>['init'];
   
     CreateCommand() {
  -    argParser.addOption('out', abbr: 'o', help: 'The output directory.');
  +    argParser.addOption('out',
  +      abbr: 'o',
  +      hide: true,
  +      help: 'The output directory.'
  +    );
       argParser.addFlag('pub',
  -        defaultsTo: true,
  -        help: 'Whether to run "pub get" after the project has been created.');
  -  }
  +      defaultsTo: true,
  +      help: 'Whether to run "pub get" after the project has been created.'
  +    );
  +  }
  +
  +  String get invocation => "${runner.executableName} $name <output directory>";
   
     @override
     Future<int> run() async {
  -    if (!argResults.wasParsed('out')) {
  +    if (!argResults.wasParsed('out') && argResults.rest.isEmpty) {
         printStatus('No option specified for the output directory.');
  -      printStatus(argParser.usage);
  +      printStatus(usage);
         return 2;
       }
   
  
positive.code:       return 2;
      }
  
      Directory out = new Directory(argResults['out']);
  
      new FlutterSimpleTemplate().generateInto(out, flutterPackagePath);
  
  
negative.code:       printError('variable was specified. Unable to find package:flutter.');
        return 2;
      }
  
      String flutterRoot = path.absolute(ArtifactStore.flutterRoot);
  
      String flutterPackagePath = path.join(flutterRoot, 'packages', 'flutter');
  