[jdk20] RFR: JDK-8297305: Clarify that javax.lang.model.util.Elements.overrides is irreflexive

[Joe Darcy]

Please review this spec clarification and its companion CSR https://bugs.openjdk.org/browse/JDK-8298698

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Commit messages:
 - JDK-8297305: Clarify that javax.lang.model.util.Elements.overrides is irreflexive

Changes: https://git.openjdk.org/jdk20/pull/27/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20&pr=27&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297305
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk20/pull/27.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/27/head:pull/27

PR: https://git.openjdk.org/jdk20/pull/27