(define-button-type): Clarify type of NAME in docstring.

lisp/ChangeLog

+2008-01-27  Thien-Thi Nguyen  <ttn@gnuvola.org>
+
+	* button.el (define-button-type): Clarify type of NAME in docstring.
+
 2008-01-26  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* server.el (server-buffer): New const.

lisp/button.el

@@ -116,7 +116,7 @@ Buttons inherit them by setting their `category' property to that symbol."
 
 ;;;###autoload
 (defun define-button-type (name &rest properties)
-  "Define a `button type' called NAME.
+  "Define a `button type' called NAME (a symbol).
 The remaining arguments form a sequence of PROPERTY VALUE pairs,
 specifying properties to use as defaults for buttons with this type
 \(a button's type may be set by giving it a `type' property when