test rename overhaul: step 8 - language tests

tests/language/constructor_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 make sure we catch missing new or const
 // when allocating a new object.
 
 
 class Point {
   const Point(this.x, this.y);
   final int x;
   final int y;
 }
 
 
 class ConstructorNegativeTest {
   static testMain() {
     Point p = Point(1, 2);   // should be const or new before Point(1,2).
   }
 }
 
 main() {
   ConstructorNegativeTest.testMain();
 }