Update runtime files.
diff --git a/runtime/syntax/rnoweb.vim b/runtime/syntax/rnoweb.vim
index 9b1dfc7..7d42395 100644
--- a/runtime/syntax/rnoweb.vim
+++ b/runtime/syntax/rnoweb.vim
@@ -1,9 +1,9 @@
" Vim syntax file
" Language: R noweb Files
" Maintainer: Johannes Ranke <jranke@uni-bremen.de>
-" Last Change: 2007 Mär 30
-" Version: 0.8
-" SVN: $Id$
+" Last Change: 2009 May 05
+" Version: 0.9
+" SVN: $Id: rnoweb.vim 84 2009-05-03 19:52:47Z ranke $
" Remarks: - This file is inspired by the proposal of
" Fernando Henrique Ferraz Pereira da Rosa <feferraz@ime.usp.br>
" http://www.ime.usp.br/~feferraz/en/sweavevim.html
@@ -25,6 +25,7 @@
unlet b:current_syntax
syn cluster texMatchGroup add=@rnoweb
+syn cluster texMathMatchGroup add=rnowebSexpr
syn cluster texEnvGroup add=@rnoweb
syn cluster texFoldGroup add=@rnoweb
syn cluster texDocGroup add=@rnoweb