This is to enhance the character break analysis in `java.text.BreakIterator` to conform to the extended grapheme cluster boundaries defined in https://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries. A corresponding CSR has also been drafted, as there will be behavioral changes with this modification.
------------- Commit messages: - 8291660: Grapheme support in BreakIterator - 8291660: Add a method to stream extended grapheme clusters in a String Changes: https://git.openjdk.org/jdk/pull/9991/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9991&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8291660 Stats: 251 lines in 10 files changed: 170 ins; 48 del; 33 mod Patch: https://git.openjdk.org/jdk/pull/9991.diff Fetch: git fetch https://git.openjdk.org/jdk pull/9991/head:pull/9991 PR: https://git.openjdk.org/jdk/pull/9991
