Goal:
    A : Type  HA : ReflectEq A  x : option A  y : option A
  ============================
   (reflectProp (x = y) (eq_option eqb x y))


DEBUG:Going to execute:
intros; CoreTactics.destruct_all_rec_calls; simpl in *;
            try progress (CoreTactics.reverse; simplify_equalities)