<p>Here is some <del class="critic"><em>incorrect</em></del> Markdown.  I am adding this<ins class="critic"> here</ins>.  Here is some more <del class="critic">text that I am removing</del>text.  And here is even more <ins class="critic">text that I am </ins>adding.<del class="critic break">&nbsp;</del><ins class="critic">  </ins>Paragraph was deleted and replaced with some spaces.<del class="critic">  </del></p><ins class="critic break">&nbsp;</ins><p>Spaces were removed and a paragraph was added.</p><p>And here is a comment on <mark class="critic">some text</mark><span class="critic comment">This works quite well. I just wanted to comment on it.</span>. Substitutions <del class="critic">is</del><ins class="critic">are</ins> great!</p><p>General block handling.</p><del class="critic block"><ul><li>test remove</li><li>test remove</li><li>test remove<ul><li>test remove</li></ul></li><li>test remove</li></ul></del><ins class="critic block"><ul><li>test add</li><li>test add</li><li>test add<ul><li>test add</li></ul></li><li>test add</li></ul></ins>