[issue26457] Error in ipaddress.address_exclude function

[Xiang Zhang]

Xiang Zhang added the comment:

In old ipaddr.py, IPv4Network('192.0.2.0/31').subnet() returns [IPv4Network('192.0.2.0/32'), IPv4Network('192.0.2.1/32')], but ipaddress returns only [IPv4Network('192.0.2.0/32')]. 

It seems simply change end to end+1 in https://hg.python.org/cpython/file/tip/Lib/ipaddress.py#l921 can solve the problem and pass the test. But maybe there are some side effects.

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<http://bugs.python.org/issue26457>
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