[lworld] Integrated: 8331220: [lworld] minor clean up (no runtime change)

[Mandy Chung]

Mostly documentation clean up.   Minor code clean up.

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Commit messages:
 - typo
 - 8331220: [lworld] minor clean up (no runtime change)

Changes: https://git.openjdk.org/valhalla/pull/1085/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1085&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331220
  Stats: 28 lines in 7 files changed: 3 ins; 9 del; 16 mod
  Patch: https://git.openjdk.org/valhalla/pull/1085.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1085/head:pull/1085

PR: https://git.openjdk.org/valhalla/pull/1085