RFR: 8338140: (str) Add notes to String.trim and String.isEmpty pointing to newer APIs [v4]

[Brian Burkhalter]

On Thu, 12 Jun 2025 23:39:44 GMT, Stuart Marks <smarks at openjdk.org> wrote:

>> Add a note to String.trim pointing to the String.strip family of methods.
>> 
>> Add notes cross-linking String.isBlank and String.isEmpty.
>
> Stuart Marks has updated the pull request incrementally with one additional commit since the last revision:
> 
>   More wording updates.

Looks fine to me, as well.

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Marked as reviewed by bpb (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25762#pullrequestreview-2923064187