lisp/gnus/gnus-start.el (gnus-activate-group): Fix typo reported by Tim Landscheidt

lisp/gnus/ChangeLog

+2014-11-07  Tassilo Horn  <tsdh@gnu.org>
+
+	* gnus-start.el (gnus-activate-group): Fix typo reported by Tim
+	Landscheidt.
+
 2014-10-29  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Simplify use of current-time and friends.

lisp/gnus/gnus-start.el

@@ -1475,7 +1475,7 @@ newsgroup."
   "Check whether a group has been activated or not.
 If SCAN, request a scan of that group as well.  If METHOD, use
 that select method instead of determining the method based on the
-group name.  If DONT-CHECK, don't check check whether the group
+group name.  If DONT-CHECK, don't check whether the group
 actually exists.  If DONT-SUB-CHECK or DONT-CHECK, don't let the
 backend check whether the group actually exists."
   (let ((method (or method (inline (gnus-find-method-for-group group))))