[jdk17u-dev] RFR: 8297695: Fix typos in test/langtools files

[Goetz Lindenmaier]

I backport this for parity with 17.0.12-oracle.

Resolved JavadocTester because of extra line at end of file.
Will mark clean.

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Commit messages:
 - Backport e10778accef05bb17eea20d589086b50e366dc4d

Changes: https://git.openjdk.org/jdk17u-dev/pull/2383/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=2383&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297695
  Stats: 11 lines in 10 files changed: 0 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/2383.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/2383/head:pull/2383

PR: https://git.openjdk.org/jdk17u-dev/pull/2383