RFR: 8011916: Spec update for java.util.stream + 8024339: j.u.s.Stream.reduce(BinaryOperator) throws unexpected NPE

[Henry Jen]

Hi,

Please kindly review webrev at
http://cr.openjdk.java.net/~henryjen/ccc/8011916/0/webrev/

The webrev brings over the latest javadoc overhaul occurred in lambda
repo. The specdiff can be found at

http://cr.openjdk.java.net/~henryjen/ccc/8011916/0/specdiff/overview-summary.html

There is also some minor cleanup for code, variable renaming, add
@Override etc.

Bug 8024339 is resolved with spec updated to clarify NPE could be thrown
if reduce operation got a null as result.

Cheers,
Henry