((output
  (((f.ml (1 0) (1 4))
    (paragraph (((f.ml (1 0) (1 3)) (word foo)) ((f.ml (1 3) (1 4)) space))))
   ((f.ml (1 4) (1 18)) (modules ((root Foo unknown))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 4-18:\
   \n'{!modules ...}' should begin on its own line.")))
