hg: amber/amber: Automatic merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 4a290521b9d2
Author:    mcimadamore
Date:      2019-02-22 14:52 +0100
URL:       http://hg.openjdk.java.net/amber/amber/rev/4a290521b9d2

Automatic merge with default

- src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/markup/HtmlConstants.java