Small fixups: spacing issues, typing errors, clarify return value divergence at their sites. Tidy up barrettReduce block comment. Testing: build / GHA
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - fix Changes: https://git.openjdk.org/jdk/pull/32295/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=32295&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8386580 Stats: 31 lines in 5 files changed: 2 ins; 2 del; 27 mod Patch: https://git.openjdk.org/jdk/pull/32295.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/32295/head:pull/32295 PR: https://git.openjdk.org/jdk/pull/32295
