Add reference to "indistinguishable" in Object.equals.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - JDK-8388527: Add "indistinguishable" cross-reference to Double's discussion of equality Changes: https://git.openjdk.org/jdk/pull/32114/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=32114&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8388527 Stats: 3 lines in 1 file changed: 2 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/32114.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/32114/head:pull/32114 PR: https://git.openjdk.org/jdk/pull/32114
