diff -r be944660c56a -r 3d72ae0968f4 wp/wp-includes/blocks/spacer/block.json
--- a/wp/wp-includes/blocks/spacer/block.json	Wed Sep 21 18:19:35 2022 +0200
+++ b/wp/wp-includes/blocks/spacer/block.json	Tue Sep 27 16:37:53 2022 +0200
@@ -1,4 +1,5 @@
 {
+	"$schema": "https://schemas.wp.org/trunk/block.json",
 	"apiVersion": 2,
 	"name": "core/spacer",
 	"title": "Spacer",
@@ -7,11 +8,11 @@
 	"textdomain": "default",
 	"attributes": {
 		"height": {
-			"type": "number",
-			"default": 100
+			"type": "string",
+			"default": "100px"
 		},
 		"width": {
-			"type": "number"
+			"type": "string"
 		}
 	},
 	"usesContext": [ "orientation" ],