[issue25735] math.factorial doc should mention integer return type

[Cheryl Sabella]

Cheryl Sabella <cheryl.sabella at gmail.com> added the comment:

@John.Yeung, thank you for the report.  @mine0901, thanks for the initial patch and @akshaysharma, thank you for the PR.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue25735>
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