tweak message to better accommodate the case in which state is declared after a regular property

documentation/docs/98-reference/.generated/compile-errors.md

@@ -211,10 +211,10 @@ Cannot bind to %thing%
 ### constructor_state_reassignment
 
 ```
-Cannot redeclare stateful field `%name%` in the constructor. The field was originally declared here: `%original_location%`
+A state field declaration in a constructor must be the first assignment, and the only one that uses a rune
 ```
 
-To create stateful class fields in the constructor, the rune assignment must be the _first_ assignment to the class field.
+[State fields]($state#Classes) can be declared as normal class fields or inside the constructor, in which case the declaration must be the _first_ assignment.
 Assignments thereafter must not use the rune.
 
 ```ts

packages/svelte/messages/compile-errors/script.md

@@ -12,9 +12,9 @@
 
 ## constructor_state_reassignment
 
-> Cannot redeclare stateful field `%name%` in the constructor. The field was originally declared here: `%original_location%`
+> A state field declaration in a constructor must be the first assignment, and the only one that uses a rune
 
-To create stateful class fields in the constructor, the rune assignment must be the _first_ assignment to the class field.
+[State fields]($state#Classes) can be declared as normal class fields or inside the constructor, in which case the declaration must be the _first_ assignment.
 Assignments thereafter must not use the rune.
 
 ```ts

packages/svelte/src/compiler/errors.js

@@ -105,14 +105,12 @@ export function constant_binding(node, thing) {
 }
 
 /**
- * Cannot redeclare stateful field `%name%` in the constructor. The field was originally declared here: `%original_location%`
+ * A state field declaration in a constructor must be the first assignment, and the only one that uses a rune
  * @param {null | number | NodeLike} node
- * @param {string} name
- * @param {string} original_location
  * @returns {never}
  */
-export function constructor_state_reassignment(node, name, original_location) {
-	e(node, 'constructor_state_reassignment', `Cannot redeclare stateful field \`${name}\` in the constructor. The field was originally declared here: \`${original_location}\`\nhttps://svelte.dev/e/constructor_state_reassignment`);
+export function constructor_state_reassignment(node) {
+	e(node, 'constructor_state_reassignment', `A state field declaration in a constructor must be the first assignment, and the only one that uses a rune\nhttps://svelte.dev/e/constructor_state_reassignment`);
 }
 
 /**

packages/svelte/tests/validator/samples/class-state-constructor-1/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "constructor_state_reassignment",
-		"message": "Cannot redeclare stateful field `count` in the constructor. The field was originally declared here: `(unknown):2:1`",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
 		"start": {
 			"line": 5,
 			"column": 2

packages/svelte/tests/validator/samples/class-state-constructor-2/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "constructor_state_reassignment",
-		"message": "Cannot redeclare stateful field `count` in the constructor. The field was originally declared here: `(unknown):3:2`",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
 		"start": {
 			"line": 5,
 			"column": 2

packages/svelte/tests/validator/samples/class-state-constructor-3/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "constructor_state_reassignment",
-		"message": "Cannot redeclare stateful field `count` in the constructor. The field was originally declared here: `(unknown):3:2`",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
 		"start": {
 			"line": 5,
 			"column": 2

packages/svelte/tests/validator/samples/class-state-constructor-5/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "constructor_state_reassignment",
-		"message": "Cannot redeclare stateful field `count` in the constructor. The field was originally declared here: `(unknown):3:1`",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
 		"start": {
 			"line": 5,
 			"column": 2

packages/svelte/tests/validator/samples/class-state-constructor-6/errors.json

@@ -1,7 +1,7 @@
 [
 	{
 		"code": "constructor_state_reassignment",
-		"message": "Cannot redeclare stateful field `count` in the constructor. The field was originally declared here: `(unknown):2:1`",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
 		"start": {
 			"line": 4,
 			"column": 2

packages/svelte/tests/validator/samples/class-state-constructor-8/errors.json

@@ -0,0 +1,14 @@
+[
+	{
+		"code": "constructor_state_reassignment",
+		"message": "A state field declaration in a constructor must be the first assignment, and the only one that uses a rune",
+		"start": {
+			"line": 4,
+			"column": 2
+		},
+		"end": {
+			"line": 4,
+			"column": 24
+		}
+	}
+]

packages/svelte/tests/validator/samples/class-state-constructor-8/input.svelte.js

@@ -0,0 +1,6 @@
+export class Counter {
+	constructor() {
+		this.count = -1;
+		this.count = $state(0);
+	}
+}