RFR: [bworld-apis] adding bangs to java.util.Spliterator [v2]

[Vicente Romero]

> adding bangs to java.util.Spliterator

Vicente Romero has updated the pull request incrementally with one additional commit since the last revision:

  removing unnecessary throw NPEs

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Changes:
  - all: https://git.openjdk.org/valhalla/pull/2120/files
  - new: https://git.openjdk.org/valhalla/pull/2120/files/43d184d6..aa259bf8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2120&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2120&range=00-01

  Stats: 108 lines in 13 files changed: 0 ins; 108 del; 0 mod
  Patch: https://git.openjdk.org/valhalla/pull/2120.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2120/head:pull/2120

PR: https://git.openjdk.org/valhalla/pull/2120