$ hg diff
diff -r 0fcd1285435e src/java.base/share/classes/java/lang/ref/Cleaner.java
--- a/src/java.base/share/classes/java/lang/ref/Cleaner.java Thu Oct 18 11:23:54 2018 +0200
+++ b/src/java.base/share/classes/java/lang/ref/Cleaner.java Thu Oct 18 10:39:33 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2018, 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
@@ -100,8 +100,8 @@
  * }
  * }
  *
- * private final State;
- * private final Cleaner.Cleanable cleanable
+ * private final State state;
+ * private final Cleaner.Cleanable cleanable;
  *
  * public CleaningExample() {
  * this.state = new State(...);