((output
  (((f.ml (1 0) (1 1)) (paragraph (((f.ml (1 0) (1 1)) (word {)))))
   ((f.ml (1 1) (1 2)) (paragraph (((f.ml (1 1) (1 2)) (word })))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 0-1:\
   \n'{': bad markup.\
   \nSuggestion: escape the brace with '\\{'."
    "File \"f.ml\", line 1, characters 1-2:\
   \nUnpaired '}' (end of markup).\
   \nSuggestion: try '\\}'.")))
