Update all tests

tests/language_strong/default_implementation2_test.dart

 // Copyright (c) 2012, 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 to verify incompatible constructor types
 
 abstract class Point {
   factory Point(x, y) = PointImplementation;
 }
 
 class PointImplementation implements Point {
-   PointImplementation(int x, int y) {} /// static type warning
+   PointImplementation(int x, int y) {} //# static type warning
 }
 
 main() {
   new Point(1, 2);
 }