Add __bool__ to None

Lib/test/test_descr.py

 import builtins
 import sys
 import types
 import math
 import unittest
 
 from copy import deepcopy
 from test import support
 
 
@@ skipping 2050 matching lines @@
         m2instance.a = 1
         self.assertEqual(m2instance.__dict__, "Not a dict!")
         try:
             dir(m2instance)
         except TypeError:
             pass
 
         # Two essentially featureless objects, just inheriting stuff from
         # object.
         self.assertEqual(dir(NotImplemented), dir(Ellipsis))
-        if support.check_impl_detail():
-            # None differs in PyPy: it has a __nonzero__
-            self.assertEqual(dir(None), dir(Ellipsis))
 
         # Nasty test case for proxied objects
         class Wrapper(object):
             def __init__(self, obj):
                 self.__obj = obj
             def __repr__(self):
                 return "Wrapper(%s)" % repr(self.__obj)
             def __getitem__(self, key):
                 return Wrapper(self.__obj[key])
             def __len__(self):
@@ skipping 2249 matching lines @@
         type.mro(tuple)
 
 
 def test_main():
     # Run all local test cases, with PTypesLongInitTest first.
     support.run_unittest(PTypesLongInitTest, OperatorsTest,
                               ClassPropertiesAndMethods, DictProxyTests)
 
 if __name__ == "__main__":
     test_main()