showdownjs/test/functional/makehtml/cases/issues/crazy-urls.html

<p><img src="images(1)/cat(1).png" alt="my cat" /></p>
<p><a href="images(1)/cat(1).png">my cat</a></p>
<p><img src="some.com/crazy url with spaces" alt="foo" /></p>
<p><img src="some.com/crazy url with spaces" alt="foo" title="title" /></p>
<p><a href="some.com/crazy url with spaces">foo</a></p>
<p><a href="some.com/crazy url with spaces" title="title">foo</a></p>
<p><img src="" alt="empty" /></p>
<p><a href="">empty</a></p>
<p><img src="" alt="empty" title="title" /></p>
<p><a href="" title="title">empty</a></p>
<p><img src="" alt="empty" /></p>
<p><a href="">empty</a></p>
<p><img src="" alt="empty" title="title" /></p>
<p><a href="" title="title">empty</a></p>