[issue17648] test_urllib2 convert doctests to unittest

[Roundup Robot]

Roundup Robot added the comment:

New changeset eb632aafff57 by Senthil Kumaran in branch 'default':
#17648 - Clean up test_urllib2.py. Converted doctests to unittest for
http://hg.python.org/cpython/rev/eb632aafff57

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nosy: +python-dev

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<http://bugs.python.org/issue17648>
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