result: 
(module [(prelude "prelude")] [] [])
result: 
(module [] [(import "import" [(import_path [] me)])] [])
error at line 1, column 0:
unexpected 'i'
expected "prelude", "import", command or end of input
result: 
(module
 [(prelude "prelude")]
 [(import "import" [(import_path ["." "."] a) (import_path [] b)])
  (import "import" [(import_path [] c)])]
 [])
result: 
(module [] [] [(open "open" [[me [] [] [] []] [you [] [] [] []]])])
result: 
(module
 []
 []
 [(open
   "open"
   [[me
     [["as" you]]
     [[["(" a] [b c] ")"]]
     [[["(" "renaming"] [[a "->" b] [c "->" d]] ")"]]
     [["(" "hiding" [a b] ")"]]]])])
result: 
(module
 []
 []
 [(open "open" [[a [] [] [] []]])
  (section
   "section"
   [b]
   [(open "open" [[c [] [] [] []]])
    (section "section" [d] [(open "open" [[e [] [] [] []]])] "end" [d])]
   "end"
   [b])])
result: 
(module [] [] [(section "section" [a] [] "end" [])])
result: 
(module [] [] [["notation" [[] [[["`" "Prop" "`" []] []]]] ":=" (hole "_")]])
error at line 10, column 24:
expected "_"