Add `show_whitespaces` in the highlighters documentation page
Add `show_whitespaces` in the highlighters documentation page

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