Fix regression introduced by 5af27f30adababcb837b647a68f1a38249d55b2f
Fix regression introduced by 5af27f30adababcb837b647a68f1a38249d55b2f

The problem was that the method used to return `nil` in case the lock
was not present, but after that commit it started returning a "\n"

Helabs/jumpup-deis,Helabs/jumpup-heroku