[docs] [issue28211] Wrong return value type in the doc of PyMapping_Keys/Values/Items

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Thank you for your report and patch Xiang Zhang!

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

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28211>
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