Fix some docstrings.

* helm-files.el (helm-multi-files):                    Do it.
* helm-locate.el (helm-locate-recursive-dirs-command): Do it.

helm-files.el

@@ -3799,10 +3799,12 @@ Run all sources defined in `helm-for-files-preferred-list'."
 
 ;;;###autoload
 (defun helm-multi-files ()
-  "Preconfigured helm similar to `helm-for-files' but that don't run locate.
-Allow toggling from locate to others sources.
-This allow seeing first if what you search is in other sources before launching
-locate."
+  "Preconfigured helm like `helm-for-files' but running locate only on demand.
+
+Allow toggling back and forth from locate to others sources with
+`helm-multi-files-toggle-locate-binding' key.
+This avoid launching needlessly locate when what you search is already
+found."
   (interactive)
   (unless helm-source-buffers-list
     (setq helm-source-buffers-list

helm-locate.el

@@ -113,11 +113,16 @@ directories of this list with `helm-projects-find-files'."
   :type '(repeat string))
 
 (defcustom helm-locate-recursive-dirs-command "locate -i -e -A --regex '^%s' '%s.*$'"
-  "Command used in recursive directories completion in `helm-find-files'.
+  "Command used for recursive directories completion in `helm-find-files'.
 
 For Windows and `es' use something like \"es -r ^%s.*%s.*$\"
 
-The two format specs are mandatory."
+The two format specs are mandatory.
+
+If for some reasons you can't use locate because your filesystem
+doesn't have a data base, you can use find command from findutils but
+be aware that it will be much slower, see `helm-find-files' embebded
+help for more infos."
   :type 'string
   :group 'helm-files)