Mon Sep 12 13:13:54 UTC 2005  Toni Timonen <ttimonen@movial.fi>
  * Fix validity problem with rss feeds and unknown email addresses.
diff -rN -u old-darcsweb/darcsweb.cgi new-darcsweb/darcsweb.cgi
--- old-darcsweb/darcsweb.cgi	2015-10-20 11:37:00.000000000 +0000
+++ new-darcsweb/darcsweb.cgi	2015-10-20 11:37:00.000000000 +0000
@@ -1512,7 +1512,7 @@
 		if "@" in p.author:
 			author = p.author
 		else:
-			author = "%s <unknown@email>" % p.author
+			author = "%s &lt;unknown@email&gt;" % p.author
 
 		print """
   <item>