Display non breaking spaces with ⍽ in show_whitespaces hihglighter
Display non breaking spaces with ⍽ in show_whitespaces hihglighter

Fixes #167

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