Fix: (WARNING/2) Inline interpreted text or phrase reference start-string without end-string.
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>tips index</title>
</head>
<frameset cols="220,*">
<frame src="index.html" name="toc">
<frame src="index.html" name="article">
</frameset>
</html>