XXX hand-rolled; CVS keyword in patch

--- demos/demo.tcl.orig	Wed Jun  8 21:27:44 2011
+++ demos/demo.tcl	Wed Oct 12 18:09:25 2011
@@ -1,4 +1,6 @@
-#!/bin/wish84.exe
+#! /bin/sh
+# the next line restarts with tclsh \
+exec tclsh "$0" ${1+"$@"}
 
 # Copyright (c) 2002-2011 Tim Baker