RFR: 8318487: Specification of the ListFormat.equals() method can be improved [v3]

[Naoto Sato]

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

Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:

  Reflecting review comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/16321/files
  - new: https://git.openjdk.org/jdk/pull/16321/files/0e586395..57b91b4b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=16321&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=16321&range=01-02

  Stats: 6 lines in 1 file changed: 1 ins; 0 del; 5 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