RFR: 8333828: Use value javadoc tag in java.lang.{Float, Double} [v3]

[Joe Darcy]

> 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.

Joe Darcy has updated the pull request incrementally with one additional commit since the last revision:

  Reflow paragraphs.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19607/files
  - new: https://git.openjdk.org/jdk/pull/19607/files/ea23aaf0..5d140fb2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19607&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19607&range=01-02

  Stats: 23 lines in 2 files changed: 4 ins; 0 del; 19 mod
  Patch: https://git.openjdk.org/jdk/pull/19607.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19607/head:pull/19607

PR: https://git.openjdk.org/jdk/pull/19607