Tab after task list item marker
.......

+ [x]	item 1
+ [ ]		item 2

.......

<ul class="contains-task-list">
<li class="task-list-item"><input class="task-list-item-checkbox" type="checkbox" checked="">	item 1</li>
<li class="task-list-item"><input class="task-list-item-checkbox" type="checkbox">		item 2</li>
</ul>