adjust error message

src/compiler/compile/nodes/Element.ts

@@ -408,7 +408,7 @@ export default class Element extends Node {
 				if (!(parent.type === 'InlineComponent' || (parent.type === 'Element' && /-/.test(parent.name)))) {
 					component.error(attribute, {
 						code: `invalid-slotted-content`,
-						message: `Element with a slot='...' attribute must be a direct descendant of a component or custom element`,
+						message: `Element with a slot='...' attribute must be a child of a component or custom element`,
 					});
 				}
 			}
@@ -419,7 +419,7 @@ export default class Element extends Node {
 					message: `The 'is' attribute is not supported cross-browser and should be avoided`
 				});
 			}
-      
+
 			attribute_map.set(attribute.name, attribute);
 		});
 

test/runtime/samples/component-slot-nested-error-2/_config.js

@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a direct descendant of a component or custom element`]
+	error: [`Element with a slot='...' attribute must be a child of a component or custom element`]
 };

test/runtime/samples/component-slot-nested-error-3/_config.js

@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a direct descendant of a component or custom element`]
+	error: [`Element with a slot='...' attribute must be a child of a component or custom element`]
 };

test/runtime/samples/component-slot-nested-error/_config.js

@@ -1,3 +1,3 @@
 export default {
-	error: [`Element with a slot='...' attribute must be a direct descendant of a component or custom element`]
+	error: [`Element with a slot='...' attribute must be a child of a component or custom element`]
 };

test/runtime/samples/component-slot-nested-error/main.svelte

@@ -1,9 +1,9 @@
 <script>
-  import Nested from "./Nested.svelte";
+	import Nested from "./Nested.svelte";
 </script>
 
 <Nested>
-  <div slot="slot1">
+	<div slot="slot1">
-    <div slot="slot2" />
+		<div slot="slot2" />
-  </div>
+	</div>
 </Nested>

test/validator/samples/slot-attribute-invalid/errors.json

@@ -1,6 +1,6 @@
 [{
 	"code": "invalid-slotted-content",
-	"message": "Element with a slot='...' attribute must be a direct descendant of a component or custom element",
+	"message": "Element with a slot='...' attribute must be a child of a component or custom element",
 	"start": {
 		"line": 1,
 		"column": 5,