fix: spread attributes not work as expected

packages/svelte/src/compiler/compile/render_dom/wrappers/Element/index.js

@@ -993,7 +993,7 @@ export default class ElementWrapper extends Wrapper {
 			if (attr instanceof SpreadAttributeWrapper) {
 				const { name } = flatten_reference(attr.node.expression.node);
 				const snippet = { type: 'SpreadElement', argument: attr.node.expression.manipulate(block) };
-				static_attributes.push(p`${name}: {${snippet}}`);
+				static_attributes.push(p`${snippet}`);
 			} else {
 				const name = attr.property_name || attr.name;
 				static_attributes.push(p`${name}: ${attr.get_value(block)}`);

packages/svelte/test/js/samples/svelte-element/expected.js

@@ -21,12 +21,7 @@ function create_dynamic_element_3(ctx) {
 	return {
 		c() {
 			svelte_element = element(static_value);
-
-			set_dynamic_element_data(static_value)(svelte_element, {
-				static_value,
-				static_obj: { .../*static_obj*/ ctx[2] }
-			});
-
+			set_dynamic_element_data(static_value)(svelte_element, { static_value, .../*static_obj*/ ctx[2] });
 			toggle_class(svelte_element, "foo", static_value);
 		},
 		m(target, anchor) {
@@ -48,12 +43,7 @@ function create_dynamic_element_2(ctx) {
 	return {
 		c() {
 			svelte_element = element(/*dynamic_value*/ ctx[0]);
-
-			set_dynamic_element_data(/*dynamic_value*/ ctx[0])(svelte_element, {
-				static_value,
-				static_obj: { .../*static_obj*/ ctx[2] }
-			});
-
+			set_dynamic_element_data(/*dynamic_value*/ ctx[0])(svelte_element, { static_value, .../*static_obj*/ ctx[2] });
 			toggle_class(svelte_element, "foo", static_value);
 		},
 		m(target, anchor) {