Update all tests

tests/language_strong/mixin_invalid_inheritance2_test.dart

 // Copyright (c) 2013, 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.
 
-class C<T> = Object with Malformed;  /// 01: compile-time error
-class C<T> = Object with T;  /// 02: compile-time error
-class C<T> = OBject with T<int>;  /// 03: compile-time error
+class C<T> = Object with Malformed;  //# 01: compile-time error
+class C<T> = Object with T;  //# 02: compile-time error
+class C<T> = OBject with T<int>;  //# 03: compile-time error
 
 main() {
-  new C<C>();  /// 01: continued
-  new C<C>();  /// 02: continued
-  new C<C>();  /// 03: continued
+  new C<C>();  //# 01: continued
+  new C<C>();  //# 02: continued
+  new C<C>();  //# 03: continued
 }