<i18n dev> RFR: 8318487: Specification of the ListFormat.equals() method can be improved

[Naoto Sato]

Spec clarification of `ListFormat.equals()` method, utilizing newly introduced `getLocale()` and `getPatterns()`. A corresponding CSR has also been drafted.

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Depends on: https://git.openjdk.org/jdk/pull/16293

Commit messages:
 - Fixing typo
 - Removed redundant wording
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/16321/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16321&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318487
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/16321.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16321/head:pull/16321

PR: https://git.openjdk.org/jdk/pull/16321