Doc fix.

lisp/gnus/gnus-group.el

@@ -3462,7 +3462,7 @@ group."
 
 (defun gnus-group-find-new-groups (&optional arg)
   "Search for new groups and add them.
-Each new group will be treated with `gnus-subscribe-newsgroup-method.'
+Each new group will be treated with `gnus-subscribe-newsgroup-method'.
 With 1 C-u, use the `ask-server' method to query the server for new
 groups.
 With 2 C-u's, use most complete method possible to query the server