old_contents: DATABASE_ENGINE = 'sqlite3'
  DATABASE_NAME = '/tmp/pressroom.db'
  INSTALLED_APPS = ['pressroom']
  ROOT_URLCONF = ['pressroom.urls']
  
new_contents: DATABASE_ENGINE = 'sqlite3'
  DATABASE_NAME = '/tmp/pressroom.db'
  INSTALLED_APPS = ['pressroom', 'photologue']
  ROOT_URLCONF = ['pressroom.urls']
  
subject: add photologue to list of test apps