RFR: 8359919: Minor java.util.concurrent doc improvements [v11]

[Doug Lea]

> This collects miscellaneous open issues that can be resolved with documentation updates; each indicated by adding JDK issue numbers

Doug Lea has updated the pull request incrementally with one additional commit since the last revision:

  Address review comments; add JDK-8172177

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/25880/files
  - new: https://git.openjdk.org/jdk/pull/25880/files/26d96b88..4279a791

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25880&range=10
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25880&range=09-10

  Stats: 15 lines in 1 file changed: 5 ins; 0 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/25880.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25880/head:pull/25880

PR: https://git.openjdk.org/jdk/pull/25880