<i18n dev> RFR: 8319986: Invalid/inconsistent description and example for DateFormat

[Naoto Sato]

Correcting the explanation of the `DateFormat.SHORT` constant.

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/16645/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16645&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319986
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16645.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16645/head:pull/16645

PR: https://git.openjdk.org/jdk/pull/16645