1. <foo>test</foo>
  2. &lt;foo&gt;test&lt;/foo&gt;
  3. &amp;lt;foo&amp;gt;test&amp;lt;/foo&amp;gt;
  4. &amp;amp;lt;foo&amp;amp;gt;test&amp;amp;lt;/foo&amp;amp;gt;
  5.  
  6. ---
  7.  
  8. test test
  9. <foo>test</foo>
  10. &lt;foo&gt;test&lt;/foo&gt;