Remove older deprecated flags; more cleanup to the cli help args.

pkg/analyzer_cli/test/driver_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.test.driver;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:analyzer/error/error.dart';
@@ skipping 324 matching lines @@
     void createTests(String designator, String optionsFileName) {
       group('build-mode - $designator', () {
         // Shared driver command.
         Future<Null> doDrive(String filePath,
             {List<String> additionalArgs: const []}) async {
           await drive('file:///test_file.dart|$filePath',
               args: [
                 '--dart-sdk',
                 findSdkDirForSummaries(),
                 '--build-mode',
-                '--machine'
+                '--format=machine'
               ]..addAll(additionalArgs),
               options: 'data/options_tests_project/$optionsFileName');
         }
 
         test('no stats', () async {
           await doDrive('data/test_file.dart');
           // Should not print stat summary.
           expect(outSink.toString(), isEmpty);
           expect(errorSink.toString(), isEmpty);
           expect(exitCode, 0);
@@ skipping 171 matching lines @@
 
 ErrorProcessor processorFor(AnalysisError error) =>
     processors.firstWhere((p) => p.appliesTo(error));
 
 class TestSource implements Source {
   TestSource();
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 }