[docs] [issue27385] itertools.groupby has misleading doc string

[Raymond Hettinger]

Changes by Raymond Hettinger <raymond.hettinger at gmail.com>:


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed
versions: +Python 3.7 -Python 2.7, Python 3.5

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27385>
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