Update all tests

tests/language_strong/issue15606_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 Foo<T> {}
 
 var a = [new Object(), 42];
 
 main() {
   while (false) { // Comply to inlining heuristics.
     // Use an unresolved prefix.
-    var foo = Unresolved.foo( /// 01: static type warning
+    var foo = Unresolved.foo( //# 01: static type warning
       // Make dart2js generate a call to setRuntimeTypeInfo.
-      new Foo<int>(), /// 01: continued
+      new Foo<int>(), //# 01: continued
       // Use a one-shot interceptor.
-      a[0].toString()); /// 01: continued
+      a[0].toString()); //# 01: continued
 
     // Do an is test on `Foo` to require setRuntimeTypeInfo.
-    print(foo is Foo<int>); /// 01: continued
+    print(foo is Foo<int>); //# 01: continued
   }
 }