test-hgweb: fix css update

tests/test-hgweb.out

@@ -110,7 +110,7 b' div.index_include { border:solid #d9d8d1'
 div.search { margin:4px 8px; position:absolute; top:56px; right:12px }
 .linenr { color:#999999; text-decoration:none }
 a.rss_logo {
-	float:right; padding:3px 0px; width:35px; line-height:10px;
+	float:right; padding:3px 6px; line-height:10px;
 	border:1px solid; border-color:#fcc7a5 #7d3302 #3e1a01 #ff954e;
 	color:#ffffff; background-color:#ff6600;
 	font-weight:bold; font-family:sans-serif; font-size:10px;