refa: just a little bit of rubocop happiness

Author: salzig

spec/models/usergroup_spec.rb

@@ -90,9 +90,8 @@
         rughh.custom_recurring = true
       end
 
-
       specify 'de' do
-        allow(I18n).to receive(:tw).with('custom_recurrence').and_return("custom_recurrence")
+        allow(I18n).to receive(:tw).with('custom_recurrence').and_return('custom_recurrence')
 
         expect(rughh.localized_custom_recurrence).to eql 'custom_recurrence'
       end

spec/requests/whitelabel_spec.rb

@@ -1,9 +1,9 @@
 require 'spec_helper'
 
 describe 'Whitelabel' do
-  let(:hamburg) { Usergroup.from_name("hamburg") }
-  let(:berlin) { Usergroup.from_name("berlin") }
-  let(:tokio) { Usergroup.from_name("tokio") }
+  let(:hamburg) { Usergroup.from_name('hamburg') }
+  let(:berlin) { Usergroup.from_name('berlin') }
+  let(:tokio) { Usergroup.from_name('tokio') }
 
   around do
     whitelabel_backup = Whitelabel.labels
@@ -16,7 +16,6 @@
     Whitelabel.labels = whitelabel_backup
   end
 
-
   context 'GET label page with non existing subdomain' do
     it 'does not do an endless redirect but halts' do
       host! 'www.onruby.test'