index name can't be used as key name without space character

mysql-test/r/heap.result

@@ -62,7 +62,7 @@ explain select * from t1 where a in (869751,736494,226312,802616);
 table	type	possible_keys	key	key_len	ref	rows	Extra
 t1	range	uniq_id	uniq_id	4	NULL	4	where used; Using index
 drop table t1;
-create table t1 (x int not null, y int not null, key x(x), unique y(y))
+create table t1 (x int not null, y int not null, key x (x), unique y (y))
 type=heap;
 insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
 select * from t1 where x=1;

mysql-test/t/heap.test

@@ -36,7 +36,7 @@ alter table t1 type=myisam;
 explain select * from t1 where a in (869751,736494,226312,802616);
 drop table t1;
 
-create table t1 (x int not null, y int not null, key x(x), unique y(y))
+create table t1 (x int not null, y int not null, key x (x), unique y (y))
 type=heap;
 insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
 select * from t1 where x=1;