old_contents: from django.apps import AppConfig
  
  
  class ModuleConfig(AppConfig):
      name = 'adhocracy4.modules'
      label = 'a4modules'
  
new_contents: from django.apps import AppConfig
  
  
  class ModulesConfig(AppConfig):
      name = 'adhocracy4.modules'
      label = 'a4modules'
  
subject: Fix plural in modules app config