added code to disable complex selectors for ':not()' pseudo-classes in QSA branch but left it commented out, it will break too many tests units, accepting multiple nested complex selectors should not be seen as an error and does not produce as many negative effects as preventing it
added code to disable complex selectors for ':not()' pseudo-classes in QSA branch but left it commented out, it will break too many tests units, accepting multiple nested complex selectors should not be seen as an error and does not produce as many negative effects as preventing it

dperini/nwmatcher,dperini/nwmatcher,dperini/nwmatcher