[issue25958] Implicit ABCs have no means of "anti-registration"

[Guido van Rossum]

Guido van Rossum added the comment:

Uploading a flattened version of patch3.diff.

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Added file: http://bugs.python.org/file41519/patch3-regenerated.diff

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25958>
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