[jdk17u-dev] RFR: 8348303: Remove repeated 'a' from ListSelectionEvent

[Satyen Subramaniam]

Backporting JDK-8348303: Remove repeated 'a' from ListSelectionEvent. Trivial test change to clean up description. Ran GHA Sanity Checks, local Tier 1 and 2 tests. Patch is clean.

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Commit messages:
 - Backport 17df51516aadf5ade73cf8d05c1be09772852b96

Changes: https://git.openjdk.org/jdk17u-dev/pull/3590/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3590&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348303
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3590.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3590/head:pull/3590

PR: https://git.openjdk.org/jdk17u-dev/pull/3590