[issue11628] cmp_to_key generated class should use __slots__

[Éric Araujo]

Changes by Éric Araujo <merwok at netwok.org>:


----------
nosy: +eric.araujo
versions:  -Python 3.1, Python 3.4

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11628>
_______________________________________