test rename overhaul: step 8 - language tests

tests/language/src/Operator2Test.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.
-// Operator dart test program.
-
-class Helper {
-  int i;
-  Helper(int val) : i = val { }
-  operator [](int index) {
-    return i + index;
-  }
-  void operator []=(int index, int val) {
-    i = val;
-  }
-}
-
-class OperatorTest {
-  static testMain() {
-    Helper obj = new Helper(10);
-    Expect.equals(10, obj.i);
-    obj[10] = 20;
-    Expect.equals(30, obj[10]);
-  }
-}
-
-
-main() {
-  OperatorTest.testMain();
-}