[issue2091] file accepts 'rU+' as a mode

[Berker Peksag]

Berker Peksag <berker.peksag at gmail.com> added the comment:


New changeset 21a9ba1992775b5a833da28bfa0a9f028d1b6761 by Berker Peksag in branch 'master':
bpo-2091: Fix typo in exception message (GH-12987)
https://github.com/python/cpython/commit/21a9ba1992775b5a833da28bfa0a9f028d1b6761


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nosy: +berker.peksag

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