RFR: 8276234: Trivially clean up locale-related code

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