((output
  (((f.ml (1 0) (2 6)) (paragraph (((f.ml (1 0) (2 6)) (code_span foo)))))))
 (warnings
  ( "File \"f.ml\", line 1, character 0 to line 2, character 6:\
   \n'{%\
   \n:': bad raw markup target.\
   \nSuggestion: try '{%html:...%}'.")))
