chore: prettier source code

src/list/index.js

@@ -13,7 +13,7 @@ const [createComponent, bem, t] = createNamespace('list');
 
 export default createComponent({
   mixins: [
-    BindEventMixin(function(bind) {
+    BindEventMixin(function (bind) {
       if (!this.scroller) {
         this.scroller = getScroller(this.$el);
       }

src/list/test/index.spec.js

@@ -4,7 +4,7 @@ import { mount, later, mockGetBoundingClientRect } from '../../../test';
 test('load event', async () => {
   const wrapper = mount(List);
 
-  wrapper.vm.$on('input', value => {
+  wrapper.vm.$on('input', (value) => {
     wrapper.vm.loading = value;
   });
 
@@ -33,7 +33,7 @@ test('error loaded, click error-text and reload', async () => {
   expect(wrapper.emitted('input')).toBeFalsy();
 
   // simulate the behavior of clicking error-text
-  wrapper.vm.$on('update:error', val => {
+  wrapper.vm.$on('update:error', (val) => {
     wrapper.setProps({
       error: val,
     });