[issue11572] bring Lib/copy.py to 100% coverage

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

Regarding "__reduce__", other readers will have the same question Éric did, so that point should definitely go in a comment after the "__reduce_ex__" check.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11572>
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