  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   : ^^^^^^^^^^^^^^^
   `----
  x DocumentType
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   : ^^^^^^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   :                ^^^^^^
   `----
  x Element
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   :                ^^^^^^
   `----
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   :                               ^
   `----
  x Text
   ,-[$DIR/tests/html5lib-tests-fixture/tests25_dat.17.html:1:1]
 1 | <!DOCTYPE html><head></keygen>A
   :                               ^
   `----
