hg: amber/amber: Align code with JEP

[james.laskey at oracle.com]

Changeset: 6650d8850de0
Author:    jlaskey
Date:      2019-05-08 09:36 -0300
URL:       http://hg.openjdk.java.net/amber/amber/rev/6650d8850de0

Align code with JEP

+ src/java.base/share/classes/java/lang/MalformedEscapeException.java
! src/java.base/share/classes/java/lang/String.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavaTokenizer.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/parser/UnicodeReader.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties
! test/langtools/tools/javac/MultilineStringLiteralAPI.java
! test/langtools/tools/javac/MultilineStringLiteralLang.java