Please review a moderately simple update to permit the use of `@` as the escape character in a limited set of escape sequences.
------------- Commit messages: - JDK-8301294: Allow `@` as an escape in documentation comments Changes: https://git.openjdk.org/jdk/pull/12372/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12372&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8301294 Stats: 384 lines in 18 files changed: 351 ins; 6 del; 27 mod Patch: https://git.openjdk.org/jdk/pull/12372.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12372/head:pull/12372 PR: https://git.openjdk.org/jdk/pull/12372