hg: lambda/lambda/jdk: Tweak spec of trySplit, then ensuring spliterator from iterator

[paul.sandoz at oracle.com]

Changeset: f91091fa0cc3
Author:    psandoz
Date:      2013-04-26 17:00 +0200
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/f91091fa0cc3

Tweak spec of trySplit, then ensuring spliterator from iterator
implementations conform (a split can result in left hold all
elements and the right holding none).

! src/share/classes/java/util/Spliterator.java