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AutoFormat.RemoveEmpty
TYPE: bool
VERSION: 3.2.0
DEFAULT:
false
--DESCRIPTION--
<p>
  When enabled, HTML Purifier will
attempt to remove empty elements that
  contribute no semantic information
to the document. The following types
  of nodes will be
removed:
</p>
<ul><li>
    Tags with no attributes and
no content, and that are not empty
    elements (remove
<code>&lt;a&gt;&lt;/a&gt;</code> but not
   
<code>&lt;br /&gt;</code>), and
  </li>
 
<li>
    Tags with no content, except for:<ul>
     
<li>The <code>colgroup</code> element, or</li>
   
  <li>
        Elements with the <code>id</code> or
<code>name</code> attribute,
        when those attributes are
permitted on those elements.
      </li>
   
</ul></li>
</ul>
<p>
  Please be very careful
when using this functionality; while it may not
  seem that empty elements
contain useful information, they can alter the
  layout of a document
given appropriate styling. This directive is most
  useful when you are
processing machine-generated HTML, please avoid using
  it on regular user
HTML.
</p>
<p>
  Elements that contain only whitespace will
be treated as empty. Non-breaking
  spaces, however, do not count as
whitespace. See
  %AutoFormat.RemoveEmpty.RemoveNbsp for alternate
behavior.
</p>
<p>
  This algorithm is not perfect; you may
still notice some empty tags,
  particularly if a node had elements, but
those elements were later removed
  because they were not permitted in
that context, or tags that, after
  being auto-closed by another tag,
where empty. This is for safety reasons
  to prevent clever code from
breaking validation. The general rule of thumb:
  if a tag looked empty on
the way in, it will get removed; if HTML Purifier
  made it empty, it will
stay.
</p>
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