public void Unwrap_should_unwrap_nodes()
        {
            const string xml = @"<section>
  <dl>
  <dd class='f'><dl></dl>
  </dd>
  <dd class='e'><dl></dl></dd>
  </dl>
  </section>";
            var          doc = new DomDocument();

            doc.LoadXml(xml);
            doc.QuerySelectorAll("dl").QuerySelectorAll("> dd").Unwrap();
            Assert.Equal("<section>\n<dl>\n<dl />\n<dl />\n</dl>\n</section>",
                         doc.CompressWhitespace().ToXmlString());
        }