((output
  (((f.ml (1 0) (1 32))
    (paragraph
     (((f.ml (1 0) (1 32)) (code_span extension-Foo.constructor-Bar)))))))
 (warnings
  ( "File \"f.ml\", line 1, characters 2-15:\
   \nExpected 'type-' or an unqualified reference.")))
