title: Markdown blockquote parsing with ANTLR
body: <p>This has been something that's been bothering me for a while.  How does one go about parsing the following text into the HTML below using ANTLR?  I can't seem to wrap my head around this at all.</p>
  
  <p>Any Ideas?</p>
  
  <p>Markdown:</p>
  
  <pre>
  &gt; first line
  &gt; second line
  &gt; &gt nested quote
  </pre>
  
  <p>output HTML:</p>
  
  <pre><code>&lt;blockquote&gt;
    &lt;p&gt;first line
    second line&lt;/p&gt;
    &lt;blockquote&gt;
      &lt;p&gt;nested quote&lt;/p&gt;
    &lt;/blockquote&gt;
  &lt;/blockquote&gt;
  </code></pre>