All this does is to avoid a match in perl.prov

Index: HTML-TreeBuilder-XPath-0.12/lib/HTML/TreeBuilder/XPath.pm
===================================================================
--- HTML-TreeBuilder-XPath-0.12.orig/lib/HTML/TreeBuilder/XPath.pm	2011-01-14 13:07:18.000000000 +0100
+++ HTML-TreeBuilder-XPath-0.12/lib/HTML/TreeBuilder/XPath.pm	2011-01-14 13:08:22.366315163 +0100
@@ -93,7 +93,8 @@ sub cmp
 
 # need to modify directly the HTML::Element package, because HTML::TreeBuilder won't let me
 # change the class of the nodes it generates
-package HTML::Element;
+package
+ HTML::Element;
 use Scalar::Util qw(weaken);
 use vars qw(@ISA);