Not all normalize functions are called with multiple base sections

We have to use super(A, self) consistently in normalize functions:

class FooBase(object):
    def foo(self): pass

class A(FooBase):
    def foo(self):
        super(A, self).foo()
        print('A.foo()')

class B(FooBase):
    def foo(self):
        super(B, self).foo()
        print('B.foo()')

class C(A, B):
    def foo(self):
        super(C, self).foo()
        print('C.foo()')

C().foo()

prints

B.foo()
A.foo()
C.foo()