Fix FE part of issues spec

app/assets/javascripts/sidebar/components/assignees/sidebar_assignees.js

@@ -33,14 +33,12 @@ export default {
     saveAssignees() {
       this.loading = true;
 
-      function setLoadingFalse() {
-        this.loading = false;
-      }
-
       this.mediator.saveAssignees(this.field)
-        .then(setLoadingFalse.bind(this))
+        .then(() => {
+          this.loading = false;
+        })
         .catch(() => {
-          setLoadingFalse();
+          this.loading = false;
           return new Flash('Error occurred when saving assignees');
         });
     },

spec/features/issues_spec.rb

@@ -742,7 +742,7 @@ describe 'Issues', feature: true do
     include WaitForVueResource
 
     it 'updates the title', js: true do
-      issue = create(:issue, author: @user, assignee: @user, project: project, title: 'new title')
+      issue = create(:issue, author: @user, assignees: [@user], project: project, title: 'new title')
 
       visit namespace_project_issue_path(project.namespace, project, issue)