[issue23864] issubclass without registration only works for "one-trick pony" collections ABCs.

[Saul Shanabrook]

Changes by Saul Shanabrook <s.shanabrook at gmail.com>:


Added file: http://bugs.python.org/file38937/patch.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23864>
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