Autofix Rubocop remaining Layout rules (#23679)

db/migrate/20190314181829_migrate_open_registrations_setting.rb

@@ -2,6 +2,7 @@ class MigrateOpenRegistrationsSetting < ActiveRecord::Migration[5.2]
   def up
     open_registrations = Setting.find_by(var: 'open_registrations')
     return if open_registrations.nil? || open_registrations.value
+
     setting = Setting.where(var: 'registrations_mode').first_or_initialize(var: 'registrations_mode')
     setting.update(value: 'none')
   end
@@ -9,6 +10,7 @@ class MigrateOpenRegistrationsSetting < ActiveRecord::Migration[5.2]
   def down
     registrations_mode = Setting.find_by(var: 'registrations_mode')
     return if registrations_mode.nil?
+
     setting = Setting.where(var: 'open_registrations').first_or_initialize(var: 'open_registrations')
     setting.update(value: registrations_mode.value == 'open')
   end