marked/test/specs/new/blockquote_setext.html

<blockquote>
  <p>not heading 1 ==</p>
</blockquote>

<blockquote>
  <p>not heading 2 --</p>
</blockquote>

<blockquote>
  <h1>heading 1</h1>
</blockquote>

<blockquote>
  <h2>heading 2</h2>
</blockquote>

<blockquote>
  <p>not heading 1 == not heading 2 with br<br />--</p>
</blockquote>