--- a/test/header.htm	Fri May 24 13:35:06 2013 +0200
+++ b/test/header.htm	Fri May 24 13:53:52 2013 +0200
@@ -2,6 +2,12 @@
 <html>
   <head>
     <title>c2html</title>
+    <style type="text/css">
+      span.c2html-lineno {
+        font-style: italic;
+        color: grey;
+      }
+    </style>
   </head>
   <body>