py: Use mp_arg_check_num in more places.

Updated functions now do proper checking that n_kw==0, and are simpler
because they don't have to explicitly raise an exception.  Down side is
that the error messages no longer include the function name, but that's
acceptable.

Saves order 300 text bytes on x64 and ARM.

py/objtuple.c

@@ -57,14 +57,15 @@ void mp_obj_tuple_print(void (*print)(void *env, const char *fmt, ...), void *en
 }
 
 STATIC mp_obj_t mp_obj_tuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
-    // TODO check n_kw == 0
+    mp_arg_check_num(n_args, n_kw, 0, 1, false);
 
     switch (n_args) {
         case 0:
             // return a empty tuple
             return mp_const_empty_tuple;
 
-        case 1: {
+        case 1:
+        default: {
             // 1 argument, an iterable from which we make a new tuple
             if (MP_OBJ_IS_TYPE(args[0], &mp_type_tuple)) {
                 return args[0];
@@ -91,9 +92,6 @@ STATIC mp_obj_t mp_obj_tuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw,
 
             return tuple;
         }
-
-        default:
-            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "tuple takes at most 1 argument, %d given", n_args));
     }
 }