  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/doctype01_dat.3.html:1:1]
 1 | <!DOCTYPE>Hello
   : ^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/doctype01_dat.3.html:1:1]
 1 | <!DOCTYPE>Hello
   : ^^^^^^^^^^
   `----
  x DocumentType
   ,-[$DIR/tests/html5lib-tests-fixture/doctype01_dat.3.html:1:1]
 1 | <!DOCTYPE>Hello
   : ^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/doctype01_dat.3.html:1:1]
 1 | <!DOCTYPE>Hello
   :           ^^^^^
   `----
  x Text
   ,-[$DIR/tests/html5lib-tests-fixture/doctype01_dat.3.html:1:1]
 1 | <!DOCTYPE>Hello
   :           ^^^^^
   `----
