Fix test breakage from r40978

pkg/analyzer/test/options_test.dart

 // Copyright (c) 2013, 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 options_test;
 
 import 'package:unittest/unittest.dart';
 import 'package:analyzer/options.dart';
 
 main() {
@@ skipping 43 matching lines @@
     });
 
     test('enable enum', () {
       CommandLineOptions options = CommandLineOptions
           .parse(['--dart-sdk', '.', '--enable-enum', 'foo.dart']);
       expect(options.enableEnum, isTrue);
     });
 
     test('enable type checks', () {
       CommandLineOptions options = CommandLineOptions
-          .parse(['--dart-sdk', '.', '--enable_type_cheks', 'foo.dart']);
+          .parse(['--dart-sdk', '.', '--enable_type_checks', 'foo.dart']);
       expect(options.enableTypeChecks, isTrue);
     });
 
     test('log', () {
       CommandLineOptions options = CommandLineOptions
           .parse(['--dart-sdk', '.', '--log', 'foo.dart']);
       expect(options.log, isTrue);
     });
 
     test('machine format', () {
@@ skipping 53 matching lines @@
 //    test('ignore unrecognized flags', () {
 //      CommandLineOptions options = new CommandLineOptions.parse([
 //        '--ignore_unrecognized_flags', '--bar', '--baz', 'foo.dart']);
 //      expect(options, isNotNull);
 //      expect(options.sourceFiles, equals(['foo.dart']));
 //    });
 
   });
 
 }