[docs] [issue30456] 2to3 docs: example of fix for duplicates in second argument of isinstance has superfluous parentheses

[Berker Peksag]

Berker Peksag <berker.peksag at gmail.com> added the comment:

Looks like I forgot to backport this 3.6 branch. Now it's done. Thanks, Eli.

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions:  -Python 2.7, Python 3.5

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