title: How to add class to kramdown-generated table of content?
body: <p>I would like to add few Bootstrap classes to <code>&lt;ul id="markdown-toc"&gt;</code>. How can I do it?</p>
  
  <p>Input:</p>
  
  <pre><code>* ToC
  {:toc}
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>&lt;ul id="markdown-toc"&gt;
    &lt;li&gt;&lt;a href="#welcome" id="markdown-toc-welcome"&gt;Welcome&lt;/a&gt;&lt;/li&gt;
    &lt;li&gt;&lt;a href="#header-1" id="markdown-toc-header-1"&gt;Header 1&lt;/a&gt;&lt;/li&gt;
  &lt;/ul&gt;
  </code></pre>