Reword invalid_rest_eachblock_binding warning to better communicate about variables in nested rest properties

src/compiler/compile/compiler_warnings.ts

@@ -220,7 +220,7 @@ export default {
 	},
 	invalid_rest_eachblock_binding: (rest_element_name: string) => ({
 		code: 'invalid-rest-eachblock-binding',
-		message: `...${rest_element_name} operator will create a new object and binding propagation with original object will not work`
+		message: `The rest operator (...) will create a new object and binding '${rest_element_name}' with original object will not work`
 	}),
 	avoid_mouse_events_on_document: {
 		code: 'avoid-mouse-events-on-document',

test/validator/samples/rest-eachblock-binding-2/warnings.json

@@ -1,8 +1,8 @@
 [
   {
     "code": "invalid-rest-eachblock-binding",
-    "message": "...rest operator will create a new object and binding propagation with original object will not work",
-    "start": { "line": 8, "column": 24 },
+    "message": "The rest operator (...) will create a new object and binding 'rest' with original object will not work",
+    "start": { "line": 8, "column": 27 },
 		"end": { "line": 8, "column": 31 }
   }
 ]

test/validator/samples/rest-eachblock-binding-3/warnings.json

@@ -1,8 +1,8 @@
 [
   {
     "code": "invalid-rest-eachblock-binding",
-    "message": "...rest operator will create a new object and binding propagation with original object will not work",
-    "start": { "line": 5, "column": 32 },
+    "message": "The rest operator (...) will create a new object and binding 'rest' with original object will not work",
+    "start": { "line": 5, "column": 35 },
     "end": { "line": 5, "column": 39 }
   }
 ]

test/validator/samples/rest-eachblock-binding-nested-rest/input.svelte

@@ -0,0 +1,9 @@
+<script>
+	const a = [[1, 2, 3, 4, 5]];
+</script>
+
+{#each a as [first, second, ...[third, ...{ length }]]}
+	<p>{first}, {second}, {length}</p>
+	<input bind:value={third} />
+	<input bind:value={length} />
+{/each}

test/validator/samples/rest-eachblock-binding-nested-rest/warnings.json

@@ -0,0 +1,26 @@
+[
+  {
+    "code": "invalid-rest-eachblock-binding",
+    "end": {
+      "column": 37,
+      "line": 5
+    },
+    "message": "The rest operator (...) will create a new object and binding 'third' with original object will not work",
+    "start": {
+      "column": 32,
+      "line": 5
+    }
+  },
+  {
+    "code": "invalid-rest-eachblock-binding",
+    "end": {
+      "column": 50,
+      "line": 5
+    },
+    "message": "The rest operator (...) will create a new object and binding 'length' with original object will not work",
+    "start": {
+      "column": 44,
+      "line": 5
+    }
+  }
+]

test/validator/samples/rest-eachblock-binding/warnings.json

@@ -1,8 +1,8 @@
 [
   {
     "code": "invalid-rest-eachblock-binding",
-    "message": "...rest operator will create a new object and binding propagation with original object will not work",
-		"start": { "line": 5, "column": 25 },
+    "message": "The rest operator (...) will create a new object and binding 'rest' with original object will not work",
+    "start": { "line": 5, "column": 28 },
     "end": { "line": 5, "column": 32 }
   }
 ]