[docs] [issue34712] Style fixes in examples of "Input and Output" tutorial section

[Ned Deily]

Ned Deily <nad at python.org> added the comment:

Thanks for the improvement!

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nosy: +ned.deily
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34712>
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