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gh-152246: Fix pure-Python `zoneinfo` accepting invalid seperators in POSIX TZ (`Mm.w.d`) rules #270998

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gh-152246: Fix pure-Python `zoneinfo` accepting invalid seperators in POSIX TZ (`Mm.w.d`) rules

gh-152246: Fix pure-Python `zoneinfo` accepting invalid seperators in POSIX TZ (`Mm.w.d`) rules #270998

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DO-NOT-MERGE

succeeded Jun 26, 2026 in 5s

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