Please review this PR to use modern APIs and language features to simplify equals for BitSet.
I couldn't see how to refactor hashCode using Arrays utility methods in a way that preserves its specification. So, aside from refactoring its doc comment and annotating it with `@Overrides`, I left it intact. ------------- Commit messages: - Initial commit Changes: https://git.openjdk.org/jdk/pull/14868/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14868&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8312019 Stats: 22 lines in 1 file changed: 6 ins; 11 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/14868.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14868/head:pull/14868 PR: https://git.openjdk.org/jdk/pull/14868
