small readability tweak

packages/svelte/src/compiler/phases/2-analyze/visitors/CallExpression.js

@@ -114,17 +114,16 @@ export function CallExpression(node, context) {
 		case '$state':
 		case '$state.raw':
 		case '$derived':
-		case '$derived.by':
+		case '$derived.by': {
-			if (
+			const valid =
-				!(
 				is_variable_declaration(parent, context) ||
 				is_class_property_definition(parent) ||
 				context.state.class_state?.is_class_property_assignment_at_constructor_root(
 					parent,
 					context.path.slice(0, -1)
-					)
+				);
-				)
+
-			) {
+			if (!valid) {
 				e.state_invalid_placement(node, rune);
 			}
 
@@ -135,6 +134,7 @@ export function CallExpression(node, context) {
 			}
 
 			break;
+		}
 
 		case '$effect':
 		case '$effect.pre':