((output
  (((f.ml (1 0) (1 2)) (paragraph (((f.ml (1 0) (1 2)) (bold ())))))
   ((f.ml (1 3) (1 15)) (@author Foo}))))
 (warnings
  ( "File \"f.ml\", line 1, characters 3-15:\
   \n'@author' is not allowed in '{b ...}' (boldface text)."
    "File \"f.ml\", line 1, characters 0-2:\
   \n'{b ...}' (boldface text) should not be empty."
    "File \"f.ml\", line 1, characters 3-15:\
   \n'@author' should begin on its own line.")))
