<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>test file x: xxx element optional with xxx attribute</title>
</head>

<body>
<!-- h1 includes element and attribute(s) in test -->
<h1><code>xxx</code> element with <code>xxx attribute</code></h1>
<!-- element and attribute(s) working example -->
<p><a href="xxx">HTML5 xxx element</a></p>
<!-- element and attribute(s) code -->
<h2>Code</h2>
<p><code>&lt;xxx href=&quot;xxx&quot;&gt;HTML5&lt;/xxx&gt;</code></p>
<!-- link(s) toelement and attribute(s) in test -->
<h2>Reference</h2>
<p><a href="xxx">HTML5 xxx element</a></p>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>test file x: xxx element optional with xxx attribute</title>
</head>

<body>
<!-- h1 includes element and attribute(s) in test -->
<h1><code>xxx</code> element with <code>xxx attribute</code></h1>
<!-- element and attribute(s) working example -->
<p><a href="xxx">HTML5 xxx element</a></p>
<!-- element and attribute(s) code -->
<h2>Code</h2>
<p><code>&lt;xxx href=&quot;xxx&quot;&gt;HTML5&lt;/xxx&gt;</code></p>
<!-- link(s) toelement and attribute(s) in test -->
<h2>Reference</h2>
<p><a href="xxx">HTML5 xxx element</a></p>
</body>
</html>

Make @LjWatson lang attribute fix
Make @LjWatson lang attribute fix
