<i18n dev> RFR: 8284856: Add a test case for checking UnicodeScript entity numbers [v3]

[Naoto Sato]

> Added the test case, and eliminated the immediate hashmap value, replaced with the ordinal number of `Character.UnicodeScript.UNKNOWN`.

Naoto Sato has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 29 commits:

 - Merge branch 'master' into JDK-8284856
 - Fixed a typo
 - 8284856: Add a test case for checking UnicodeScript entity numbers
 - add `@LastModified: Apr 2022` to DocumentCache
 - revert changes on ProcessEnvironment
 - fix usage in XSAttributeChecker
 - update LastModified
 - Copyright latest year to 2022
 - revert changes in:
   src/java.desktop
   src/java.management
   src/jdk.internal.vm.ci
   src/jdk.jfr
   src/jdk.management.jfr
   src/jdk.management
   src/utils/IdealGraphVisualizer
 - Add apiNote to appropriate constructors of HM, LHM, and WHM.
 - ... and 19 more: https://git.openjdk.java.net/jdk/compare/145dfed0...2a5f3f72

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Changes: https://git.openjdk.java.net/jdk/pull/8253/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8253&range=02
  Stats: 13 lines in 2 files changed: 8 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8253.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8253/head:pull/8253

PR: https://git.openjdk.java.net/jdk/pull/8253