Rerun the previous command.

def do_retry(self, arg):
        """Rerun the previous command."""
        prev_line = self.curframe.f_lineno - 1
        # Make sure not to jump to the middle of the previous statement
        while True:
            try:
                self.curframe.f_lineno = prev_line
                break

            except ValueError:
                prev_line -= 1

        self.do_jump(prev_line)
        self.do_continue(arg)
        return 1