hg: amber/amber: Automatic merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 37c2e3959ba4
Author:    mcimadamore
Date:      2019-01-31 22:07 +0100
URL:       http://hg.openjdk.java.net/amber/amber/rev/37c2e3959ba4

Automatic merge with default

! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java
- test/hotspot/jtreg/gc/g1/TestStringTableStats.java
- test/langtools/jdk/javadoc/doclet/testHtmlWarning/TestHtmlWarning.java