Fix warnings_checker.dart handling of multitests

tests/lib_strong/mirrors/get_field_static_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.
 
 @MirrorsUsed(targets: "A")
 import 'dart:mirrors';
 
 import 'package:expect/expect.dart';
 
 class A {
   static foo(y, [x]) => y;
   static get bar => 499;
   static operator$foo([optional = 499]) => optional;
   static var x = 42;
   static final y = "toto";
   static const z = true;
 }
 
 main() {
   var cm = reflectClass(A);
   var closure = cm.getField(#foo).reflectee;
   Expect.equals("b", closure("b"));
 
   closure = cm.getField(#operator$foo).reflectee;
   Expect.equals(499, closure());
 
   Expect.equals(499, cm.getField(#bar).reflectee);
   Expect.equals(42, cm.getField(#x).reflectee);
-  Expect.equals("toto", cm.getField(#y).reflectee); // /// 00: ok
-  Expect.equals(true, cm.getField(#z).reflectee); //   /// 00: ok
+  Expect.equals("toto", cm.getField(#y).reflectee); // //# 00: ok
+  Expect.equals(true, cm.getField(#z).reflectee); //   //# 00: ok
 }