- a
-- b
--- c
~~~~~~~~~~
<ul class="remarkup-list">
<li class="remarkup-list-item">a<ul class="remarkup-list">
<li class="remarkup-list-item">b<ul class="remarkup-list">
<li class="remarkup-list-item">c</li>
</ul></li>
</ul></li>
</ul>
~~~~~~~~~~
- a
  - b
    - c
