From 0edb98158999f83162b07b96448fdc91c2c4ddb4 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 17 Aug 1994 20:30:22 +0000
Subject: [PATCH] (tex-mode): Allow for documentclass options when checking for
 SliTeX.

---
 lisp/textmodes/tex-mode.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/textmodes/tex-mode.el b/lisp/textmodes/tex-mode.el
index 00518f8578b..bec121b4100 100644
--- a/lisp/textmodes/tex-mode.el
+++ b/lisp/textmodes/tex-mode.el
@@ -262,7 +262,8 @@ says which mode to use."
 				    (search-forward "%" search-end t))))))
       (if (and slash (not comment))
 	  (setq mode (if (looking-at "documentstyle\\|documentclass")
-                         (if (looking-at "documentstyle{slides}\\|documentclass{slides}")
+                         (if (looking-at
+			      "document\\(style\\|class\\)\\(\\[.*\\]\\)?{slides}")
                              'slitex-mode
                            'latex-mode)
 		       'plain-tex-mode))))
-- 
2.39.5