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Report TS1518 for all negated Unicode-set union operands (#4832)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: RyanCavanaugh <6685088+RyanCavanaugh@users.noreply.github.com>
C
Copilot committed
48f583496ea6d5a59d8015d7bf4597495e51ffea
Parent: bf570ca
Committed by GitHub <noreply@github.com> on 8/14/2026, 7:47:32 PM