RFR: 8340082: Use inline return tag in java.base

[Naoto Sato]

On Fri, 13 Sep 2024 02:47:18 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Candidates for this refactoring were found programmatically; the program to find candidates is in a comment on the bug.

`java.nio.charset` and `java.time.format` changes look good

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Marked as reviewed by naoto (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/20981#pullrequestreview-2303567979