Improve help output and Windows VM hack.

tools/testing/dart/test_options.dart

 // Copyright (c) 2011, 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("test_options_parser");
 
 #import("dart:io");
 #import("dart:builtin");
 #import("drt_updater.dart");
 
@@ skipping 77 matching lines @@
           new _TestOptionSpecification(
               'runtime',
               '''Where the tests should be run.
     vm: Run Dart code on the standalone dart vm.
     
     d8: Run JavaScript from the command line using v8.
     
     drt: Run Dart or JavaScript in the headless version of Chrome, 
          DumpRenderTree.
     
-    ff or firefox: Run JavaScript in Firefox.
-    
-    chrome: Run JavaScript in Chrome.
-    
-    safari: Run JavaScript in Safari.
-    
-    ie: Run JavaScript in Internet Explorer.
-    
-    opera: Run JavaScript in Opera.
+    [ff | chrome | safari | ie | opera]: Run JavaScript in the specified 
+         browser.
     
     none: No runtime, compile only (for example, used for dartc static analysis 
           tests).''',
               ['-r', '--runtime'],
               ['vm', 'd8', 'drt', 'ff', 'firefox', 'chrome', 
               'safari', 'ie', 'opera', 'none'],
               'vm'),
           new _TestOptionSpecification(
               'arch',
               'The architecture to run tests for',
@@ skipping 497 matching lines @@
         return option;
       }
     }
     print('Unknown test option $name');
     exit(1);
   }
 
 
   List<_TestOptionSpecification> _options;
 }