RFR: 8336787: Examine java.text.Format API for implSpec usage

[Chen Liang]

On Tue, 23 Jul 2024 17:51:04 GMT, Justin Lu <jlu at openjdk.org> wrote:

> As discussed in https://bugs.openjdk.org/browse/JDK-8335834, there are occurrences in the java.text.Format API that would benefit from the implSpec (and apiNote) tag. 
> 
> This is a doc-only change, and a CSR has also been filed.
> 
> I did not think "_Subclasses that support fields should override this and create an ..._" sounded right under the `implSpec` tag, and moved it to an `apiNote` tag.

Marked as reviewed by liach (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/20303#pullrequestreview-2194680165