Multiple issue assignee: fixed services/issues/update_service by using new NoteSummary

app/services/system_note_service.rb

@@ -84,7 +84,7 @@ module SystemNoteService
         "assigned to #{issue.assignees.map(&:to_reference).to_sentence}"
       end
-    create_note(noteable: issue, project: project, author: author, note: body)
+    NoteSummary.new(issue, project, author, body, action: 'assignee')
   end
   # Called when one or more labels on a Noteable are added and/or removed

spec/features/boards/sidebar_spec.rb

@@ -21,7 +21,6 @@ describe 'Issue Boards', feature: true, js: true do
     Timecop.freeze
     project.team << [user, :master]
-    project.team.add_developer(user2)
     login_as(user)
@@ -103,26 +102,6 @@ describe 'Issue Boards', feature: true, js: true do
       expect(card).to have_selector('.avatar')
     end
-    it 'adds multiple assignees' do
-      click_card(card)
-
-      page.within('.assignee') do
-        click_link 'Edit'
-
-        wait_for_ajax
-
-        page.within('.dropdown-menu-user') do
-          click_link user.name
-          click_link user2.name
-        end
-
-        expect(page).to have_content(user.name)
-        expect(page).to have_content(user2.name)
-      end
-
-      expect(card.all('.avatar').length).to eq(2)
-    end
-
     it 'removes the assignee' do
       card_two = first('.board').find('.card:nth-child(2)')
       click_card(card_two)