} clone ;
! test set-at, at, at*
-{ "seven" } [ <tree> "seven" 7 pick set-at 7 of ] unit-test
-{ "seven" t } [ <tree> "seven" 7 pick set-at 7 ?of ] unit-test
-{ 8 f } [ <tree> "seven" 7 pick set-at 8 ?of ] unit-test
-{ "seven" } [ <tree> "seven" 7 pick set-at 7 of ] unit-test
-{ "replacement" } [ <tree> "seven" 7 pick set-at "replacement" 7 pick set-at 7 of ] unit-test
-{ "replaced four" } [ test-tree 4 of ] unit-test
-{ "nine" } [ test-tree 9 of ] unit-test
+[ "seven" ] [ <tree> "seven" 7 pick set-at 7 of ] unit-test
+[ "seven" t ] [ <tree> "seven" 7 pick set-at 7 ?of ] unit-test
+[ 8 f ] [ <tree> "seven" 7 pick set-at 8 ?of ] unit-test
+[ "seven" ] [ <tree> "seven" 7 pick set-at 7 of ] unit-test
+[ "replacement" ] [ <tree> "seven" 7 pick set-at "replacement" 7 pick set-at 7 of ] unit-test
+[ "replaced four" ] [ test-tree 4 of ] unit-test
+[ "nine" ] [ test-tree 9 of ] unit-test
! test delete-at
-{ f } [ test-tree 9 over delete-at 9 of ] unit-test
-{ "replaced seven" } [ test-tree 9 over delete-at 7 of ] unit-test
-{ "replaced four" } [ test-tree 9 over delete-at 4 of ] unit-test
-{ "nine" "replaced four" } [ test-tree 7 over delete-at 9 over at 4 rot at ] unit-test
-{ "nine" } [ test-tree 7 over delete-at 4 over delete-at 9 of ] unit-test
+[ f ] [ test-tree 9 over delete-at 9 of ] unit-test
+[ "replaced seven" ] [ test-tree 9 over delete-at 7 of ] unit-test
+[ "replaced four" ] [ test-tree 9 over delete-at 4 of ] unit-test
+[ "nine" "replaced four" ] [ test-tree 7 over delete-at 9 over at 4 rot at ] unit-test
+[ "nine" ] [ test-tree 7 over delete-at 4 over delete-at 9 of ] unit-test