hg: jdk/sandbox: 8245153: Unicode encoded double-quoted empty string does not compile

[chris.hegarty at oracle.com]

Changeset: 4ad56e422d35
Author:    asotona
Date:      2020-05-29 09:56 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4ad56e422d35

8245153: Unicode encoded double-quoted empty string does not compile
Summary: Fixed parsing of Unicode encoded double-quoted empty strings in c.s.t.j.p.JavaTokenizer::scanString
Reviewed-by: jlaskey

! src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavaTokenizer.java
+ test/langtools/tools/javac/8245153/T8245153.java