RFR: 8276234: Trivially clean up locale-related code

[Pavel Rappo]

Please review this PR. A comprehensive test job has been scheduled; I'll notify this thread once that job has completed.

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Commit messages:
 - Fix *code* typo
 - Be more immutable
 - Fix typos

Changes: https://git.openjdk.java.net/jdk/pull/6191/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6191&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276234
  Stats: 10 lines in 3 files changed: 0 ins; 1 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6191.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6191/head:pull/6191

PR: https://git.openjdk.java.net/jdk/pull/6191