def pointer_line(self, prop, start, stop):
        a, b, c = self.positions(prop, start, stop)
        if b == 1:
            t = ""
            b = 0
        else:
            t = "^"
            b -= 2

        t0 = timediff(prop["start"], start)
        t1 = timediff(prop["stop"], start)
        begin = a + 10 - 1 - len(t0)
        return "%s%s ^%s%s %s" % (" " * begin, t0, " " * b, t, t1)
dataset/ETHPy150Open ohmu/poni/poni/times.py/Times.pointer_line/swapped operands of `-`