test rename overhaul: step 8 - language tests

tests/language/label3_negative_test.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.
 // Dart test program to test check that we catch label errors.
 
 
 class Label3NegativeTest {
   static testMain() {
     L: while (false) {
       if (true) break L; // Ok
     }
     continue L; // Illegal: L is out of scope.
   }
 }
 
 
 main() {
   Label3NegativeTest.testMain();
 }