Example 279
(adds classes to ul/li elements)
......

- [ ] foo
- [x] bar

......

<ul class="contains-task-list">
<li class="task-list-item"><input class="task-list-item-checkbox" type="checkbox" disabled="" /> foo</li>
<li class="task-list-item"><input class="task-list-item-checkbox" type="checkbox" disabled="" checked="" /> bar</li>
</ul>