Error message fix in `describe-specified-language-support'

* international/mule-cmds.el
(describe-specified-language-support): Make the error message
clearer (bug#8905).

lisp/ChangeLog

@@ -1,5 +1,9 @@
 2011-07-15  Lars Magne Ingebrigtsen  <larsi@gnus.org>
 
+	* international/mule-cmds.el
+	(describe-specified-language-support): Make the error message
+	clearer (bug#8905).
+
 	* emacs-lisp/cl-macs.el (declare): Add a doc string (bug#8690).
 
 	* isearch.el (isearch-barrier): Add a doc string, since it's

lisp/international/mule-cmds.el

@@ -2059,7 +2059,7 @@ See `set-language-info-alist' for use in programs."
 		  (or (not (eq last-command-event 'Default))
 		      (setq last-command-event 'English))
 		  (setq language-name (symbol-name last-command-event))))
-	(error "Bogus calling sequence"))
+	(error "This command should only be called from the menu bar"))
     (describe-language-environment language-name)))
 
 (defun describe-language-environment (language-name)