((output
  (((f.ml (1 0) (1 7))
    (paragraph
     (((f.ml (1 0) (1 7)) (bold (((f.ml (1 3) (1 6)) (word Foo))))))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 0-7:\
   \nHeadings not allowed in this comment.")))
