--- old/src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor6.java	2020-03-13 20:21:06.078000000 -0700
+++ new/src/java.compiler/share/classes/javax/lang/model/util/AbstractElementVisitor6.java	2020-03-13 20:21:05.706000000 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2020, 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
@@ -36,22 +36,25 @@
  * appropriate for the {@link SourceVersion#RELEASE_6 RELEASE_6}
  * source version.
  *
- * <p> <b>WARNING:</b> The {@code ElementVisitor} interface
- * implemented by this class may have methods added to it in the
- * future to accommodate new, currently unknown, language structures
- * added to future versions of the Java&trade; programming language.
- * Therefore, methods whose names begin with {@code "visit"} may be
- * added to this class in the future; to avoid incompatibilities,
- * classes which extend this class should not declare any instance
- * methods with names beginning with {@code "visit"}.
+ * @apiNote
+ * <p id=note_for_subclasses><strong>WARNING:</strong> The {@code
+ * ElementVisitor} interface implemented by this class may have
+ * methods added to it in the future to accommodate new, currently
+ * unknown, language structures added to future versions of the
+ * Java&trade; programming language.  Therefore, methods whose names
+ * begin with {@code "visit"} may be added to this class in the
+ * future; to avoid incompatibilities, classes and subclasses which
+ * extend this class should not declare any instance methods with
+ * names beginning with {@code "visit"}.</p>
  *
  * <p>When such a new visit method is added, the default
- * implementation in this class will be to call the {@link
- * #visitUnknown visitUnknown} method.  A new abstract element visitor
- * class will also be introduced to correspond to the new language
- * level; this visitor will have different default behavior for the
- * visit method in question.  When the new visitor is introduced, all
- * or portions of this visitor may be deprecated.
+ * implementation in this class will be to directly or indirectly call
+ * the {@link #visitUnknown visitUnknown} method.  A new abstract
+ * element visitor class will also be introduced to correspond to the
+ * new language level; this visitor will have different default
+ * behavior for the visit method in question.  When a new visitor is
+ * introduced, portions of this visitor class may be deprecated,
+ * including its constructors.
  *
  * @param <R> the return type of this visitor's methods.  Use {@link
  *            Void} for visitors that do not need to return results.