arset="utf-8"&gt;
&lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;
&lt;meta name="generator" content="pandoc" /&gt;
&lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
&lt;meta property="og:title" content="$pagetitle$" /&gt;
&lt;meta property="og:type" content="book" /&gt;
$if(url)$&lt;meta property="og:url" content="$url$" /&gt;$endif$
$if(cover-image)$&lt;meta property="og:image" content="$url$$cover-image$" /&gt;$endif$
$if(description)$&lt;meta property=