[issue8743] set() operators don't work with collections.Set instances

[Raymond Hettinger]

Raymond Hettinger added the comment:

Adding tests for non-set iterables as suggested by Serhiy.

----------
Added file: http://bugs.python.org/file35353/fix_set_abc2.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8743>
_______________________________________