RFR: JDK-8308987: Update java.lang.Class to use javadoc snippets [v2]

[Joe Darcy]

> Straightforward doc refactoring to use snippets.

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

  Respond to review feedback.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14194/files
  - new: https://git.openjdk.org/jdk/pull/14194/files/1e3ee228..6b414c50

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14194&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14194&range=00-01

  Stats: 10 lines in 1 file changed: 0 ins; 1 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14194.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14194/head:pull/14194

PR: https://git.openjdk.org/jdk/pull/14194