[issue3445] Ignore missing attributes in functools.update_wrapper

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

I think it would be better to test with some of the real world examples given in this issue: str.split, and a functools.partial object.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue3445>
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