RFR: JDK-8307184: Incorrect/inconsistent specification and implementation for Elements.getDocComment [v10]

[Joe Darcy]

> Start by just reformatting the existing specs to highlight subsequent spec changes.

Joe Darcy has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 12 additional commits since the last revision:

 - Implement review feedback.
 - Merge branch 'master' into JDK-8307184
 - Add test case for newlines.
 - Use "whitespace" as an adjective.
 - Augment test.
 - Respond to review comments.
 - Merge branch 'master' into JDK-8307184
 - Appease jcheck.
 - Updates.
 - Add tests; adjust spec.
 - ... and 2 more: https://git.openjdk.org/jdk/compare/c3976970...9e5c7b04

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15062/files
  - new: https://git.openjdk.org/jdk/pull/15062/files/99fae194..9e5c7b04

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15062&range=09
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15062&range=08-09

  Stats: 7717 lines in 306 files changed: 4545 ins; 1532 del; 1640 mod
  Patch: https://git.openjdk.org/jdk/pull/15062.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15062/head:pull/15062

PR: https://git.openjdk.org/jdk/pull/15062