anchor.diff:        } on FormatException {
           print('Invalid port number: ${results[PORT_OPTION]}');
           print('');
  -        _printUsage(parser.parser, analytics);
  +        _printUsage(parser, analytics);
           exitCode = 1;
           return null;
         }
  
positive.code:   }
  
    /// Print information about how to use the server.
    void _printUsage(ArgParser parser, telemetry.Analytics analytics,
        {bool fromHelp = false}) {
      print('Usage: $BINARY_NAME [flags]');
      print('');
      print('Supported flags are:');
  
negative.code: import 'package:telemetry/crash_reporting.dart';
  import 'package:telemetry/telemetry.dart' as telemetry;
  
  /// The [Driver] class represents a single running instance of the analysis
  /// server application.  It is responsible for parsing command line options
  /// and starting the HTTP and/or stdio servers.
  class Driver implements ServerStarter {
    /// The name of the application that is used to start a server.
    static const BINARY_NAME = 'analysis_server';
  
    /// The name of the option used to set the identifier for the client.
    static const String CLIENT_ID = 'client-id';
  