fixed failing title test

app/assets/javascripts/repo/helpers/repo_helper.js

@@ -8,6 +8,7 @@ const RepoHelper = {
 
   getDefaultActiveFile() {
     return {
+      id: '',
       active: true,
       binary: false,
       extension: '',

spec/javascripts/repo/components/repo_file_spec.js

@@ -7,6 +7,7 @@ import { file } from '../mock_data';
 describe('RepoFile', () => {
   const updated = 'updated';
   const otherFile = {
+    id: 'test',
     html: '<p class="file-content">html</p>',
     pageTitle: 'otherpageTitle',
   };