RFR: 8347027: String replaceAll with Function<String, String>

[kieran-farrell]

New API to the String.java class - replaceAllMapped(String, Function<MatchResult, String>) that allows regex based replacement via a user defined function allowing dynamic replacemnt based on the match. It delegates to the already existing Pattern.matcher().replaceAll(Function).

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Commit messages:
 - whitespace
 - updates
 - replaceAllMapped and test

Changes: https://git.openjdk.org/jdk/pull/25335/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25335&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347027
  Stats: 61 lines in 3 files changed: 61 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/25335.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25335/head:pull/25335

PR: https://git.openjdk.org/jdk/pull/25335