shr.el (shr-tag-del): Add support for del tag.

lisp/gnus/ChangeLog

+2011-05-16  Julien Danjou  <julien@danjou.info>
+
+	* shr.el (shr-tag-del): Add support for del tag.
+
 2011-05-13  Katsumi Yamaoka  <yamaoka@jpl.org>
 	* gnus-html.el (gnus-html-put-image): Register a displayer.

lisp/gnus/shr.el

@@ -780,6 +780,9 @@ ones, in case fg and bg are nil."
 (defun shr-tag-s (cont)
   (shr-fontize-cont cont 'shr-strike-through))
 
+(defun shr-tag-del (cont)
+  (shr-fontize-cont cont 'shr-strike-through))
+
 (defun shr-tag-b (cont)
   (shr-fontize-cont cont 'bold))