[3.15] gh-160781: Fix StringIO.truncate() rejecting sizes above 2**31 - 1 on Windows (GH-160784) - #160918

[3.15] gh-160781: Fix StringIO.truncate() rejecting sizes above 2**31 - 1 on Windows (GH-160784)#160918

StanFromIreland merged 1 commit into

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