- bincover.py: typo `NOne` -> `None` in _value2bin fallback path
(would raise NameError if bin_index is out of range).
- complex/complex.py: rename `__neq__` to `__ne__`. Python has no
`__neq__` dunder, so `!=` was not using the intended definition.
On Python 3 it silently fell back to the auto-derived inverse of
`__eq__`; on Python 2 it fell back to identity comparison.
