Fix test runner to consider Kakoune returning non 0 as a failure
Fix test runner to consider Kakoune returning non 0 as a failure

occivink/kakoune,alexherbo2/kakoune,mawww/kakoune,casimir/kakoune,flavius/kakoune,danr/kakoune,jkonecny12/kakoune,jkonecny12/kakoune,alexherbo2/kakoune,flavius/kakoune,jjthrash/kakoune,alexherbo2/kakoune,danr/kakoune,casimir/kakoune,jjthrash/kakoune,ekie/kakoune,jkonecny12/kakoune,jjthrash/kakoune,occivink/kakoune,lenormf/kakoune,occivink/kakoune,flavius/kakoune,alexherbo2/kakoune,Somasis/kakoune,mawww/kakoune,ekie/kakoune,lenormf/kakoune,jjthrash/kakoune,mawww/kakoune,casimir/kakoune,danr/kakoune,lenormf/kakoune,jkonecny12/kakoune,ekie/kakoune,danr/kakoune,occivink/kakoune,casimir/kakoune,lenormf/kakoune,flavius/kakoune,Somasis/kakoune,Somasis/kakoune,mawww/kakoune,Somasis/kakoune,ekie/kakoune