Fix failing pipelines

ee/app/services/epic_links/create_service.rb

+# frozen_string_literal: true
+
 module EpicLinks
   class CreateService < IssuableLinks::CreateService
     def execute

ee/app/services/epic_links/list_service.rb

+# frozen_string_literal: true
+
 module EpicLinks
   class ListService < IssuableLinks::ListService
     private

ee/spec/helpers/epics_helper_spec.rb

@@ -50,7 +50,7 @@ describe EpicsHelper do
       expect(meta_data['parent']).to eq({
         'id' => parent_epic.id,
         'title' => parent_epic.title,
-        'url' => "/groups/#{group.full_path}/-/epics/#{parent_epic.id}"
+        'url' => "/groups/#{group.full_path}/-/epics/#{parent_epic.iid}"
       })
       expect(meta_data['start_date']).to eq('2000-01-01')
       expect(meta_data['start_date_sourcing_milestone_title']).to eq(milestone1.title)

ee/spec/models/epic_spec.rb

@@ -79,7 +79,7 @@ describe Epic do
     end
   end
 
-  describe '#ancestors' do
+  describe '#ancestors', :nested_groups do
     let(:group) { create(:group) }
     let(:epic1) { create(:epic, group: group) }
     let(:epic2) { create(:epic, group: group, parent: epic1) }
@@ -94,7 +94,7 @@ describe Epic do
     end
   end
 
-  describe '#descendants' do
+  describe '#descendants', :nested_groups do
     let(:group) { create(:group) }
     let(:epic1) { create(:epic, group: group) }
     let(:epic2) { create(:epic, group: group, parent: epic1) }

ee/spec/services/epic_links/create_service_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-describe EpicLinks::CreateService do
+describe EpicLinks::CreateService, :nested_groups do
   describe '#execute' do
     let(:group) { create(:group) }
     let(:user) { create(:user) }
@@ -67,7 +67,7 @@ describe EpicLinks::CreateService do
           include_examples 'returns success'
         end
 
-        context 'when an epic from a subgroup is given', :nested_groups do
+        context 'when an epic from a subgroup is given' do
           let(:subgroup) { create(:group, parent: group) }
 
           before do
@@ -151,7 +151,7 @@ describe EpicLinks::CreateService do
           end
         end
 
-        context 'when adding an wolud would exceed level 5 in hierarchy' do
+        context 'when adding an epic would would exceed level 5 in hierarchy' do
           context 'when adding to already deep structure' do
             before do
               epic1 = create(:epic, group: group)