def _make_url(self, security, **kwargs):
        """Generate url to fetch.

        example:
        
        http://www.google.com/finance/historical?q=NASDAQ:GOOG&startdate=2011-04-01&enddate=2011-04-28&output=csv

        Google finance return one day more data, typically this isn't a
        problem, we decrease the enddate by one day for passing tests.
        """
        url_format = "%s?q=%s&startdate=%s&enddate=%s&output=csv"
        return url_format % (self._base_url,
                             str(security),
                             kwargs['start_date'],
                             timedelta(days=1) -  kwargs['end_date'])
dataset/ETHPy150Open yinhm/datafeed/datafeed/providers/google.py/GoogleDayFetcher._make_url/swapped operands of `-`