hg: jdk8/tl/jdk: 8020977: StringJoiner merges with itself not as expected

[stuart.marks at oracle.com]

Changeset: 09a77a1bdbc3
Author:    henryjen
Date:      2013-07-30 15:47 -0700
URL:       http://hg.openjdk.java.net/jdk8/tl/jdk/rev/09a77a1bdbc3

8020977: StringJoiner merges with itself not as expected
Reviewed-by: psandoz, chegar, mduigou, smarks

! src/share/classes/java/util/StringJoiner.java
! test/java/util/StringJoiner/MergeTest.java