s="s">&quot;icon-check-empty icon-stack-base&quot;</span><span class="nt">&gt;&lt;/i&gt;</span>
  <span class="nt">&lt;i</span> <span class="na">class=</span><span class="s">&quot;icon-twitter&quot;</span><span class="nt">&gt;&lt;/i&gt;</span>
<span class="nt">&lt;/span&gt;</span>
icon-twitter on icon-check-empty<span class="nt">&lt;br&gt;</span>
<span class="nt">&lt;span</span> <span class="na">class=</span><span class="s">&quot;icon-stack&quot;</span><span class="nt">&gt;</span>
  <span class="nt">&lt;i</