chat-client/node_modules/showdown/test/issues/#390.brackets-in-URL-break-images.html

<p>This is an <img src="./image/cat(1).png" alt="image" /></p>
<p>This is another <img src="./image/cat(1).png" alt="image" /></p>
<p><a href="http://example.com"><img src="./image/cat(1).png" alt="image link" /></a></p>
<p><a href="http://example.com"><img src="./image/cat1).png" alt="image link" /></a></p>