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

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 74e79b2c114a by Sandro Tosi in branch 'default':
#11572: improvements to copy module tests along with removal of old test suite
http://hg.python.org/cpython/rev/74e79b2c114a

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nosy: +python-dev

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