handle the case where grep is an alias to egrep egrep -G (grep -EG) results in conflicting matchers
handle the case where grep is an alias to egrep
egrep -G (grep -EG) results in conflicting matchers

waxzce/autoenv,kennethreitz/autoenv,cehoffman/autoenv,waxzce/autoenv,kennethreitz/autoenv,cehoffman/autoenv