  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   : ^^^^^^^^^^^^^^^
   `----
  x DocumentType
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   : ^^^^^^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Attribute
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                      ^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Attribute
   ,-[$DIR/tests/html5lib-tests-fixture/tests9_dat.23.html:1:1]
 1 | <!DOCTYPE html><body xlink:href=foo><math xlink:href=foo></math>
   :                                           ^^^^^^^^^^^^^^
   `----
