Allow single-dash options to be specified without a space before value.

tests/stub-generator/test_config.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("stub_generator_test_config");
 
 #import("../../tools/testing/dart/test_suite.dart");
 
 class StubGeneratorTestSuite extends StandardTestSuite {
   StubGeneratorTestSuite(Map configuration)
       : super(configuration,
+              "stub-generator",
               "tests/stub-generator/src",
               ["tests/stub-generator/stub-generator.status"]) {
     // TODO(ager): Support the stub generation part of this test on
     // dartc.
     if (configuration["component"] == "dartc") {
       print("Warning: stub-generator tests on dartc do not test generation");
     }
   }
 
   bool isTestFile(String filename) => filename.contains("-generatedTest.dart");
 }