[docs] [issue16077] fix code example in docs for built-in reduce()

[Chris Jerdonek]

Chris Jerdonek added the comment:

Serhiy, feel free to create a new issue for Doc/howto/functional.rst if you feel an addition there is warranted.

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resolution:  -> fixed
stage: needs patch -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16077>
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