test rename overhaul: step 8 - language tests

tests/language/src/ContextArgsWithDefaultsTest.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.
-
-class ContextArgsWithDefaultsTest {
-  static void testMain() {
-    crasher(1, 'foo')();
-  }
-
-  static crasher(int fixed, [String optional = '']) {
-    return () {
-      Expect.equals(1, fixed);
-      Expect.equals('foo', optional);
-    };
-  }
-
-}
-
-main() {
-  ContextArgsWithDefaultsTest.testMain();
-}