Fix string view created from a temporary string
Fix string view created from a temporary string

This is clearly a case where rust style lifetime analysis would
have been nice, hopefully it comes with GSL lifetime extensions...

Fixes #680

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