def tick(self, incr=1):
        """Advance the current progress, and redraw the screen.

        :param incr: Raise the current progress by this amount. Default: 1
        """
        self.current += incr

        if self.current and self.current % self.milestone_stride == 0:
            now = datetime.now()
            duration = self.milestone_time - now
            duration = duration.seconds + duration.microseconds / 1e6
            rate = self.milestone_stride / duration
            remaining = self.total - self.current
            self.estimated = int(remaining / rate / 60)
            self.milestone_time = now

        self.draw()
dataset/ETHPy150Open mozilla/kitsune/kitsune/sumo/utils.py/Progress.tick/swapped operands of `-`