RFR: 8512: Fixing various minor typos and nits

[Marcus Hirt]

Eclipse spelling error and some other minor nits.

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Commit messages:
 - Fixing additional nits
 - 8512: Fixing various spelling errors and minor nits

Changes: https://git.openjdk.org/jmc/pull/700/files
  Webrev: https://webrevs.openjdk.org/?repo=jmc&pr=700&range=00
  Issue: https://bugs.openjdk.org/browse/JMC-8512
  Stats: 14 lines in 5 files changed: 0 ins; 1 del; 13 mod
  Patch: https://git.openjdk.org/jmc/pull/700.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/700/head:pull/700

PR: https://git.openjdk.org/jmc/pull/700