Document that json rpc requests will be written new-line separated
Document that json rpc requests will be written new-line separated

Fixes #717

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