hg: lambda/lambda/jdk: - remove Spliterator.iterator(), see Streams.iteratorFrom for equivalent

[Paul Benedict]

Regarding trySplit/tryAdvance, methods that start with "try" indicate they
throw an exception upon failing to split or advance. Brian, but you did
indicate at least the first can return null, right? So why not just remove
"try" and name them split()/advance()?

I think this pattern makes sense:
tryABC -> returns element or throws an exception
ABC -> returns element or null

Paul