title: HTML: empty <p></p> tag show no line break
body: <p>We have a .NET application saving messages in axml. What we need to do is converting it to html. I have found a 3rd party lib "HtmlFromXamlConverter" does that, with a minor defect: If the axml contains multiple line breaks, it will be converted to something like:</p>
  
  <pre><code>&lt;P &gt;&lt;SPAN STYLE="text-decoration:underline;" /&gt; &lt;/P&gt;
  &lt;P &gt;&lt;SPAN STYLE="text-decoration:underline;" /&gt; &lt;/P&gt;
  &lt;P &gt;&lt;SPAN STYLE="text-decoration:underline;" /&gt; &lt;/P&gt;
  </code></pre>
  
  <p>Which only appear as 1 line break. I cannot insert a "&nbsp;" as value because there is a underline style. So the question is, is there a way to config empty P tags <code>&lt;p&gt;&lt;/p&gt;</code> showing up as line breaks?</p>