[docs] [issue29974] Change typing.TYPE_CHECKING doc example

[Berker Peksag]

Berker Peksag added the comment:


New changeset 04f389b8b357c8507b6c9642adcb8b956489e034 by Berker Peksag in branch '3.6':
bpo-29974: Improve typing.TYPE_CHECKING example (GH-982)
https://github.com/python/cpython/commit/04f389b8b357c8507b6c9642adcb8b956489e034


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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29974>
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