Method sort

test/simple_source/bug_pypy37/01_callback.py:5–8

(self, l, reverse, key_fn)

class C:
    def sort(self, l, reverse, key_fn):
        # PyPy example of CALL_METHOD_KW 2
        # 2 keyword arguments and no positional arguments
        return l.sort(reverse=reverse, key=key_fn)


def lcase(s):