Update all tests

tests/language/mixin_forwarding_constructor4_test.dart

 // Copyright (c) 2014, 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.
 
 // Verify that when no constructors are forwarded from the base class
 // through a mixin, it is always an error; the mixin does not acquire an
 // implicit default constructor.
 
 abstract class Mixin {}
 
 class Base {
   Base(
-      {x}        /// 01: compile-time error
-      {x}        /// 02: compile-time error
-      {x}        /// 03: compile-time error
+      {x}        //# 01: compile-time error
+      {x}        //# 02: compile-time error
+      {x}        //# 03: compile-time error
     );
 }
 
 class C extends Base with Mixin {
-  C();           /// 02: continued
-  C() : super(); /// 03: continued
+  C();           //# 02: continued
+  C() : super(); //# 03: continued
 }
 
 main() {
   new C();
 }