Updates:
Status: Fixed
Comment #10 on issue 1982 by smi...@gmail.com: use is None instead of ==
None
http://code.google.com/p/sympy/issues/detail?id=1982
All cases of ==/!= None have been changed with the pep8/autopep8 tools. A
note about "foo == True/False": this is equivalent to "(foo is True/False
or foo == 1/0)". All those changes have been made, too, assuming (and only
failing in one place) that "foo is True/False" is all that was meant.
Whenever a commit is being added from now on with "== True/False" the
question should be asked which syntax was intended.
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