It is backwards compatible, and by default enables backlinks in the generated pages.
-<code>
+<pre>
--- IkiWiki/Render.pm.orig2 2009-01-06 14:54:01.000000000 +1300
+++ IkiWiki/Render.pm 2009-01-06 14:55:08.000000000 +1300
@@ -107,7 +107,8 @@
my ($backlinks, $more_backlinks);
if (@backlinks <= $config{numbacklinks} || ! $config{numbacklinks}) {
$backlinks=\@backlinks;
-</code>
+</pre>