  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   :       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   :       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   :                       ^
   `----
  x Text
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.60.html:1:1]
 1 | <math><annotation-xml> </annotation-xml>
   :                       ^
   `----
