<NME> 404.tpl.php
<BEF> <h1>404 - Not Found!</h1>

<p style="margin-top: 20px;
padding-top: 10px;
border-top: 1px solid #ccc;
text-align: center;">iphp</p>

<MSG> update

<DFF> @@ -1,4 +1,4 @@
-<h1>404 - Not Found!</h1>
+<h1 style="text-align: center">404 - Not Found!</h1>
 
 <p style="margin-top: 20px;
 padding-top: 10px;

update