((output
  (((f.ml (1 0) (2 6))
    (paragraph
     (((f.ml (1 0) (2 6))
       (bold
        (((f.ml (2 0) (2 1)) (word +)) ((f.ml (2 1) (2 2)) space)
         ((f.ml (2 2) (2 5)) (word foo))))))))))
 (warnings
  ( "File \"f.ml\", line 2, characters 0-1:\
   \n'+' (numbered list item) is not allowed in '{b ...}' (boldface text).\
   \nSuggestion: move '+' so it isn't the first thing on the line.")))
