  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   :       ^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   :       ^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   :                       ^^^^^^^^^^
   `----
  x Comment
   ,-[$DIR/tests/html5lib-tests-fixture/tests20_dat.62.html:1:1]
 1 | <math><annotation-xml><!--foo-->
   :                       ^^^^^^^^^^
   `----
