Fix RuboCop offenses

- Remove redundant self
- Use do...end for multi-line blocks
- No space between ->(parameter)
- Move EE spec under EE namespace directory
- Use update! instead of update
- Use .and_return

ee/app/models/ee/group.rb

@@ -72,7 +72,7 @@ module EE
 
       validate :custom_project_templates_group_allowed, if: :custom_project_templates_group_id_changed?
 
-      scope :aimed_for_deletion, -> (date) { joins(:deletion_schedule).where('group_deletion_schedules.marked_for_deletion_on <= ?', date) }
+      scope :aimed_for_deletion, ->(date) { joins(:deletion_schedule).where('group_deletion_schedules.marked_for_deletion_on <= ?', date) }
       scope :with_deletion_schedule, -> { preload(deletion_schedule: :deleting_user) }
       scope :with_deletion_schedule_only, -> { preload(:deletion_schedule) }
 
@@ -80,14 +80,14 @@ module EE
         joins(:ldap_group_links).where(ldap_group_links: { provider: provider })
       end
 
-      scope :with_managed_accounts_enabled, -> {
+      scope :with_managed_accounts_enabled, -> do
         joins(:saml_provider).where(saml_providers:
           {
             enabled: true,
             enforced_sso: true,
             enforced_group_managed_accounts: true
           })
-      }
+      end
 
       scope :with_no_pat_expiry_policy, -> { where(max_personal_access_token_lifetime: nil) }
 
@@ -459,7 +459,7 @@ module EE
 
       return unless feature_available?(:group_webhooks)
 
-      self_and_ancestor_hooks = GroupHook.where(group_id: self.self_and_ancestors)
+      self_and_ancestor_hooks = GroupHook.where(group_id: self_and_ancestors)
       self_and_ancestor_hooks.hooks_for(hooks_scope).each do |hook|
         hook.async_execute(data, hooks_scope.to_s)
       end

ee/spec/models/group_spec.rb → ee/spec/models/ee/group_spec.rb

@@ -170,7 +170,7 @@ RSpec.describe Group do
 
     context 'after the start transition' do
       it 'sets the last sync timestamp' do
-        expect { group.start_ldap_sync }.to change { group.ldap_sync_last_sync_at }
+        expect { group.start_ldap_sync }.to change(group, :ldap_sync_last_sync_at)
       end
     end
 
@@ -388,7 +388,7 @@ RSpec.describe Group do
     let(:group) { build(:group) }
 
     before do
-      allow_any_instance_of(ApplicationSetting).to receive(:repository_size_limit).and_return(50)
+      allow_any_instance_of(ApplicationSetting).to receive(:repository_size_limit).and_return(50) # rubocop:disable RSpec/AnyInstanceOf
     end
 
     it 'returns the value set globally' do
@@ -535,7 +535,7 @@ RSpec.describe Group do
         let(:push_rule) { create(:push_rule) }
 
         it 'returns its own push rule' do
-          group.update(push_rule: push_rule)
+          group.update!(push_rule: push_rule)
 
           expect(group.predefined_push_rule).to eq(push_rule)
         end
@@ -647,7 +647,7 @@ RSpec.describe Group do
       context 'when in need of checking plan' do
         before do
           allow(Gitlab::CurrentSettings.current_application_settings)
-            .to receive(:should_check_namespace_plan?) { true }
+            .to receive(:should_check_namespace_plan?).and_return(true)
         end
 
         it 'returns true for groups in proper plan' do
@@ -918,6 +918,7 @@ RSpec.describe Group do
       let_it_be(:group) { create(:group, parent: parent_group) }
       let_it_be(:group_hook) { create(:group_hook, group: group, member_events: true) }
       let_it_be(:parent_group_hook) { create(:group_hook, group: parent_group, member_events: true) }
+
       let(:data) { { some: 'info' } }
 
       before do