[docs] [issue25909] Incorrect documentation for PyMapping_Items and like

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Seems I was wrong. PyDict_Keys/PyDict_Values/PyDict_Items return a list in Python 3. Thus comments in Include/abstract.h were correct. Xiang Zhang noticed this in issue28211.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25909>
_______________________________________