-(* saturate_term newmeta metasenv context ty *)
-(* Given a type [ty] (a backbone), it returns its head and a new metasenv in *)
-(* which there is new a META for each hypothesis, a list of arguments for the *)
-(* new applications and the index of the last new META introduced. The nth *)
-(* argument in the list of arguments is just the nth new META. *)
+(* saturate_term newmeta metasenv context ty goal_arity *)
+(* Given a type [ty] (a backbone), it returns its suffix of length *)
+(* [goal_arity] head and a new metasenv in which there is new a META for each *)
+(* hypothesis, a list of arguments for the new applications and the index of *)
+(* the last new META introduced. The nth argument in the list of arguments is *)
+(* just the nth new META. *)