add :alt command to jump to the alternate file (implementation ↔ test)
add :alt command to jump to the alternate file (implementation ↔ test)

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