parsedown/test/data/reference_title.html

<p><a href="http://example.com" title="example title">double quotes</a> and <a href="http://example.com" title="example title">single quotes</a> and <a href="http://example.com" title="example title">parentheses</a></p>
<p>[invalid title]: <a href="http://example.com">http://example.com</a> example title</p>