RFR: 8297605: DelayQueue javadoc is confusing [v2]

[Martin Buchholz]

> Inviting @DougLea and @viktorklang-ora to review.
> 
> As usual, I couldn't resist more fiddling.  
> - Added missing tests for take, remove(), remove(Object).
> - Improved DelayQueueTest's testing infrastructure
> - added more test assertions
> - linkified new javadoc definitions

Martin Buchholz has updated the pull request incrementally with one additional commit since the last revision:

  fix punctuation

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12838/files
  - new: https://git.openjdk.org/jdk/pull/12838/files/fb14b2f3..4d02235a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12838&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12838&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/12838.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/12838/head:pull/12838

PR: https://git.openjdk.org/jdk/pull/12838