[issue10868] ABCMeta.register() should work as a decorator

[Edoardo Spadolini]

Changes by Edoardo Spadolini <kerio00 at gmail.com>:


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nosy: +benjamin.peterson, durban, eric.araujo, gvanrossum, pitrou, rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10868>
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