broken link

[Dawood Khan]

Hi,

Issue: The link to the registry pattern is broken.
https://github.com/faif/python-patterns/blob/master/patterns/behavioral/registry__py3.py
__py3 should be removed in the file name for the fix.

Thanks

[Grygorii Iermolenko]

Sorry. that was me who broke it. Will fix it (soon? :).