[jdk17u-dev] RFR: 8361298: SwingUtilities/bug4967768.java fails where character P is not underline

[Goetz Lindenmaier]

I backport this for parity with 17.0.18-oracle

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Commit messages:
 - Backport 57553ca1dbc63e329116bc11764816a4c5ccb297

Changes: https://git.openjdk.org/jdk17u-dev/pull/3969/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3969&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8361298
  Stats: 9 lines in 1 file changed: 6 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3969.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3969/head:pull/3969

PR: https://git.openjdk.org/jdk17u-dev/pull/3969