cpp.kak: tweak comment copy on newline
cpp.kak: tweak comment copy on newline

fixes #92

occivink/kakoune,jkonecny12/kakoune,danielma/kakoune,occivink/kakoune,alexherbo2/kakoune,danielma/kakoune,elegios/kakoune,zakgreant/kakoune,zakgreant/kakoune,ekie/kakoune,rstacruz/kakoune,occivink/kakoune,alexherbo2/kakoune,jjthrash/kakoune,occivink/kakoune,lenormf/kakoune,elegios/kakoune,danr/kakoune,elegios/kakoune,Somasis/kakoune,Asenar/kakoune,mawww/kakoune,flavius/kakoune,Somasis/kakoune,danielma/kakoune,alexherbo2/kakoune,Asenar/kakoune,Somasis/kakoune,lenormf/kakoune,flavius/kakoune,casimir/kakoune,alexherbo2/kakoune,jjthrash/kakoune,mawww/kakoune,alpha123/kakoune,xificurC/kakoune,jkonecny12/kakoune,casimir/kakoune,lenormf/kakoune,flavius/kakoune,zakgreant/kakoune,elegios/kakoune,jkonecny12/kakoune,mawww/kakoune,rstacruz/kakoune,xificurC/kakoune,casimir/kakoune,rstacruz/kakoune,jjthrash/kakoune,alpha123/kakoune,alpha123/kakoune,rstacruz/kakoune,danr/kakoune,danr/kakoune,casimir/kakoune,lenormf/kakoune,danr/kakoune,alpha123/kakoune,ekie/kakoune,Somasis/kakoune,Asenar/kakoune,danielma/kakoune,Asenar/kakoune,zakgreant/kakoune,ekie/kakoune,jkonecny12/kakoune,flavius/kakoune,jjthrash/kakoune,xificurC/kakoune,xificurC/kakoune,ekie/kakoune,mawww/kakoune