title: Use slash after HTML tag
body: <p>I use a HTML theme for my website.
  In this theme, there are form tags are shown as <code>&lt;form/&gt;</code>.
  Why does this theme use a slash after first form tag?</p>
  
  <pre><code>&lt;div class="widget-body"&gt; 
     &lt;div class="widget-main"&gt; 
        &lt;form class="form-search" /&gt;
         &lt;input type="text" class="input-medium search-query" /&gt; 
         &lt;button onclick="return false;" class="btn btn-purple btn-small"&gt; 
            Search &lt;i class="icon-search icon-on-right bigger-110"&gt;&lt;/i&gt; 
         &lt;/button&gt; 
        &lt;/form&gt;
     &lt;/div&gt; 
  &lt;/div&gt;
  </code></pre>