--- a/langtools/test/tools/javadoc/CheckResourceKeys.java	Wed Aug 10 13:52:02 2016 -0700
+++ b/langtools/test/tools/javadoc/CheckResourceKeys.java	Wed Aug 10 15:47:46 2016 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -121,7 +121,7 @@
             if (codeKeys.contains(rk))
                 continue;
 
-            error("Resource key not found in code: " + rk);
+            error("Resource key not found in code: '" + rk + "'");
         }
     }