Fix shell expand example in README
Fix shell expand example in README

Fixes #1528

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