RFR: 8339094: Shenandoah: Fix up test output from ShenandoahNumberSeqTest

[William Kemper]

Clean

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Commit messages:
 - Backport f8273594124a2b17fe855b8eb10458e0b9291bd6

Changes: https://git.openjdk.org/shenandoah-jdk21u/pull/98/files
  Webrev: https://webrevs.openjdk.org/?repo=shenandoah-jdk21u&pr=98&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339094
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/shenandoah-jdk21u/pull/98.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah-jdk21u.git pull/98/head:pull/98

PR: https://git.openjdk.org/shenandoah-jdk21u/pull/98