RFR: 8291598: Matcher.appendReplacement should not create new StringBuilder instances [v2]

[Raffaello Giulietti]

> Remove instantiation of `StringBuilder`

Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:

  8291598: Matcher.appendReplacement should not create new StringBuilder instances
  
  Fix copyright year

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13048/files
  - new: https://git.openjdk.org/jdk/pull/13048/files/ea2eebe9..c9432a69

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13048&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13048&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13048.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/13048/head:pull/13048

PR: https://git.openjdk.org/jdk/pull/13048