{# A page that could not be delivered, written in the same shape as a real
   one: a title and one root element naming the template that wraps it.

   Sent with 200 on purpose. htmx only swaps a 2xx body, and an error status
   would leave the reader looking at the page they came from with nothing to
   say what happened. #}
<title>{{ heading }}</title>
<div class="notice" data-template="page">
  <h1>{{ heading }}</h1>
  <p>{{ text }}</p>
  <p><a href="./">All books</a></p>
</div>