showdownjs/test/features/splitAdjacentBlockquotes/basic.html

<blockquote>
    <h1 id="blockquote1">Block quote  1</h1>
    <p>This is my first block quote.</p>
</blockquote>
<blockquote>
    <h1 id="blockquote2">Block quote 2</h1>
    <p>This is my second block quote.</p>
</blockquote>