tweak message slightly, so it doesn't sound like the bad element is the one we're currently encountering

packages/svelte/src/html-tree-validation.js

@@ -212,12 +212,12 @@ export function is_tag_valid_with_parent(tag, parent_tag) {
 		case 'thead':
 		case 'tbody':
 		case 'tfoot':
-			return `\`<${tag}>\` must be the child of a \`<table>\` (but got \`<${parent_tag}>\`)`;
+			return `\`<${tag}>\` must be the child of a \`<table>\`, not a \`<${parent_tag}>\``;
 		case 'td':
 		case 'th':
-			return `\`<${tag}>\` must be the child of a \`<tr>\` (but got \`<${parent_tag}>\`)`;
+			return `\`<${tag}>\` must be the child of a \`<tr>\`, not a \`<${parent_tag}>\``;
 		case 'tr':
-			return `\`<tr>\` must be the child of a \`<thead>\`, \`<tbody>\`, or \`<tfoot>\` (but got \`<${parent_tag}>\`)`;
+			return `\`<tr>\` must be the child of a \`<thead>\`, \`<tbody>\`, or \`<tfoot>\`, not a \`<${parent_tag}>\``;
 	}
 
 	return null;

packages/svelte/tests/validator/samples/invalid-node-placement-7/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "node_invalid_placement",
-		"message": "`<tbody>` must be the child of a `<table>` (but got `<div>`). The browser will 'repair' the HTML (by moving, removing, or inserting elements) which breaks Svelte's assumptions about the structure of your components.",
+		"message": "`<tbody>` must be the child of a `<table>`, not a `<div>`. The browser will 'repair' the HTML (by moving, removing, or inserting elements) which breaks Svelte's assumptions about the structure of your components.",
 		"start": {
 			"line": 8,
 			"column": 1