[docs] [issue19953] __iadd__() doc not strictly correct

[R. David Murray]

R. David Murray added the comment:

Thanks, Pryia.

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nosy:  -python-dev
resolution:  -> fixed
stage: needs patch -> committed/rejected
status: open -> closed
type:  -> enhancement

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue19953>
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