*)
open Hbugs_types;;
+open Printf;;
let rec string_of_hint = function
| Use_ring_Luke -> "Use Ring, Luke!"
| Use_split_Luke -> "Use split, Luke!"
| Use_left_Luke -> "Use left, Luke!"
| Use_right_Luke -> "Use right, Luke!"
+ | Use_apply_Luke term -> sprintf "Apply %s, Luke!" term
| Hints hints -> String.concat "; " (List.map string_of_hint hints)
;;