<i18n dev> RFR: 8261621: Delegate Unicode history from JLS to j.l.Character

[Naoto Sato]

Please review this doc fix to j.l.Character, which now includes the table of the history of supported Unicode versions. A corresponding CSR will be filed accordingly.

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Commit messages:
 - 8261621: Delegate Unicode history from JLS to j.l.Character

Changes: https://git.openjdk.java.net/jdk/pull/2538/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2538&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261621
  Stats: 37 lines in 1 file changed: 35 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2538.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2538/head:pull/2538

PR: https://git.openjdk.java.net/jdk/pull/2538