Insert spaces after line comment markers
Insert spaces after line comment markers

Every other text editor I've ever used does this, and this makes Kakoune
consistent with how comments work in e.g. its own source code.

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