PyList_Reverse():  This was leaking a reference to Py_None on every call. I believe I introduced this bug when I refactored the reversal code so that the mergesort could use it too.  It's not a problem on the 2.2 branch.
PyList_Reverse():  This was leaking a reference to Py_None on every call.
I believe I introduced this bug when I refactored the reversal code so
that the mergesort could use it too.  It's not a problem on the 2.2 branch.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator