X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/362b9d483c714a8fd87966ddbd8686850f870e34..8f1e784f19c74702947c99d321d20fd1156b432c:/lisp/widget.el

diff --git a/lisp/widget.el b/lisp/widget.el
index a05faae6b2..2db645ab08 100644
--- a/lisp/widget.el
+++ b/lisp/widget.el
@@ -1,11 +1,9 @@
 ;;; widget.el --- a library of user interface components
 ;;
-;; Copyright (C) 1996, 1997, 2001, 2002, 2003, 2004,
-;;   2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+;; Copyright (C) 1996-1997, 2001-2016 Free Software Foundation, Inc.
 ;;
 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
 ;; Keywords: help, extensions, faces, hypermedia
-;; Version: 1.9920
 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
 ;; Package: emacs
 
@@ -37,7 +35,7 @@
 ;; Doing this is unnecessary in Emacs 20.  Kept as dummy in case
 ;; external libraries call it.  We save a kb or two of purespace by
 ;; dummying-out such definitions generally.
-(defmacro define-widget-keywords (&rest keys)
+(defmacro define-widget-keywords (&rest _keys)
   ;; ;; Don't use backquote, since that makes trouble trying to
   ;; ;; re-bootstrap from just the .el files.
   ;; (list 'eval-and-compile
@@ -82,9 +80,12 @@ create identical widgets:
 
 * (widget-create NAME)
 
-* (apply 'widget-create CLASS ARGS)
+* (apply \\='widget-create CLASS ARGS)
 
 The third argument DOC is a documentation string for the widget."
+  ;;
+  (unless (or (null doc) (stringp doc))
+    (error "widget documentation must be nil or a string."))
   (put name 'widget-type (cons class args))
   (put name 'widget-documentation (purecopy doc))
   name)
@@ -96,5 +97,4 @@ The third argument DOC is a documentation string for the widget."
 
 (provide 'widget)
 
-;; arch-tag: 932c71a3-9aeb-4827-a293-8b88b26d5c58
 ;;; widget.el ends here