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[3.11] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoader uses io.open_code (GH-145507) (#145515)

* gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoader uses io.open_code (GH-145507)
(cherry picked from commit a51b1b512de1d56b3714b65628a2eae2b07e535e)

Co-authored-by: Steve Dower <steve.dower@python.org>

* Fix docs reference

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Co-authored-by: Steve Dower <steve.dower@python.org>
M
Miss Islington (bot) committed
69ddd9bb2cc4bd69b1565647c18659c6a789ccd9
Parent: e20c6c9
Committed by GitHub <noreply@github.com> on 4/30/2026, 9:18:42 PM