* helm-files.el (helm-substitute-in-filename): Fix regexp (#597).
* helm.el (helm-make-actions): New function to build action alists.
* helm-files.el: Use it.
* helm-grep.el (helm-do-grep-1): Use helm-make-actions.
* helm-bookmark.el: Use helm-make-actions
* helm-buffers.el: SAme.
* helm.el (helm-make-actions): Fix docstring.