  x Document
   ,-[$DIR/tests/html5lib-tests-fixture/foreign-fragment_dat.17.fragment_math_ms.html:1:1]
 1 | </ms>X
   : ^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/html5lib-tests-fixture/foreign-fragment_dat.17.fragment_math_ms.html:1:1]
 1 | </ms>X
   :      ^
   `----
  x Text
   ,-[$DIR/tests/html5lib-tests-fixture/foreign-fragment_dat.17.fragment_math_ms.html:1:1]
 1 | </ms>X
   :      ^
   `----
