Fix removal of duplicated words in insert completion
Fix removal of duplicated words in insert completion

danr/kakoune,jjthrash/kakoune,alexherbo2/kakoune,casimir/kakoune,occivink/kakoune,jkonecny12/kakoune,alexherbo2/kakoune,mawww/kakoune,Somasis/kakoune,Somasis/kakoune,Somasis/kakoune,jkonecny12/kakoune,flavius/kakoune,ekie/kakoune,casimir/kakoune,mawww/kakoune,alpha123/kakoune,occivink/kakoune,jjthrash/kakoune,flavius/kakoune,alpha123/kakoune,mawww/kakoune,ekie/kakoune,lenormf/kakoune,casimir/kakoune,jjthrash/kakoune,alpha123/kakoune,occivink/kakoune,flavius/kakoune,lenormf/kakoune,occivink/kakoune,jkonecny12/kakoune,jkonecny12/kakoune,danr/kakoune,alpha123/kakoune,lenormf/kakoune,alexherbo2/kakoune,danr/kakoune,alexherbo2/kakoune,casimir/kakoune,mawww/kakoune,lenormf/kakoune,ekie/kakoune,ekie/kakoune,jjthrash/kakoune,Somasis/kakoune,flavius/kakoune,danr/kakoune