title: Markdown toc extension change `paragraph` ¶ symbol
body: <p>In <a href="http://pythonhosted.org/Markdown/extensions/toc.html#usage" rel="nofollow noreferrer">http://pythonhosted.org/Markdown/extensions/toc.html#usage</a> there is option of <code>permalink</code>.</p>
  
  <ol>
  <li>I want to change the default symbol of <code>&amp;para</code> to some other ASCII char.
  How to do it? </li>
  <li>Change the distance of the symbol form the header?</li>
  </ol>
  
  <p>Example:
  Now I get this</p>
  
  <pre><code>&lt;h3 id="title1"&gt;title1&lt;a title="Permanent link" href="#title1" class="headerlink"&gt;¶&lt;/a&gt;&lt;/h3&gt;
  </code></pre>
  
  <p>But I want to change the ¶ symbol to other ASCII and change its distance from header.</p>