New submission from Jaroslaw Rosiek <jaroslaw.ros...@interia.pl>:

Methods set.add and set.discard should return boolean values according
to collections.MutableSet but they are not.

>>> print set().add(5)
None
>>> print set().discard(5)
None

----------
components: Library (Lib)
messages: 79665
nosy: jrosiek
severity: normal
status: open
title: set.add and set.discard are not conformant to collections.MutableSet 
interface
type: behavior
versions: Python 2.6

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue4922>
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