<!doctype html>
<html lang=en>
<head>
<title></title>
<meta charset=utf-8 />
<meta name=viewport content='width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0' />
</head>
<body>
<script src=http://exploratoria.github.io/lib/reader/readme-reader.js ></script>
</body>
</html>

<!doctype html>
<html lang=en>
<head>
<title></title>
<meta charset=utf-8>
<meta name=viewport content='width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0'>
</head>
<body>
<script src=http://exploratoria.github.io/lib/reader/readme-reader.js></script>
</body>
</html>

Remove optional slash in meta tags
Remove optional slash in meta tags

Meta tags are void elements: http://www.w3.org/TR/html-markup/syntax.html#void-element