kakrc.kak: refactor grammar handling
kakrc.kak: refactor grammar handling

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