RFR: 8358618: UnsupportedOperationException no-args constructor javadoc is not clear [v2]

[Nizar Benalla]

> Please review this patch that extends the javadoc of `UnsupportedOperationException` no-arg constructor, to clear up that the detail message is null.

Nizar Benalla has updated the pull request incrementally with one additional commit since the last revision:

  review comments about consistency

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26533/files
  - new: https://git.openjdk.org/jdk/pull/26533/files/7ec75a40..f1a2e8c4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26533&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26533&range=00-01

  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/26533.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26533/head:pull/26533

PR: https://git.openjdk.org/jdk/pull/26533