RFR: 8333828: Use value javadoc tag in java.lang.{Float, Double}

[Jonathan Gibbons]

On Fri, 7 Jun 2024 21:05:33 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> Use the value tag to make the javadoc for various format-related constants more informative to readers. Currently the information is available by following the "Constant Field Values" link.
> 
> I'll reflow the paragraphs before a push.

You can omit the field name from a `{@value ...}` tag if the tag is in the doc comment for that field.   Thus, in most if not all the cases here, you can simplify all tags to just `{@value}`.

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PR Review: https://git.openjdk.org/jdk/pull/19607#pullrequestreview-2105442388