Add return value in form input to make add member specs pass

spec/features/projects/members/master_adds_member_with_expiration_date_spec.rb

@@ -20,7 +20,7 @@ feature 'Projects > Members > Master adds member with expiration date', js: true
 
       page.within '.users-project-form' do
         select2(new_member.id, from: '#user_ids', multiple: true)
-        fill_in 'expires_at', with: date.to_s(:medium)
+        fill_in 'expires_at', with: date.to_s(:medium) + "\n"
         click_on 'Add to project'
       end
 
@@ -37,7 +37,7 @@ feature 'Projects > Members > Master adds member with expiration date', js: true
       visit project_project_members_path(project)
 
       page.within "#project_member_#{new_member.project_members.first.id}" do
-        find('.js-access-expiration-date').set date.to_s(:medium)
+        find('.js-access-expiration-date').set date.to_s(:medium) + "\n"
         wait_for_requests
         expect(page).to have_content('Expires in 3 days')
       end