old_contents: # -*- coding: utf-8 -*-
  
  DEBUG = True
  SECRET_KEY = '##CHANGEME##'
  SQLALCHEMY_DATABASE_URI = 'postgresql://massa:secret@localhost/massa'
  SQLALCHEMY_ECHO = False
  
new_contents: # -*- coding: utf-8 -*-
  
  DEBUG = False
  SECRET_KEY = '##CHANGEME##'
  SQLALCHEMY_DATABASE_URI = 'postgresql://massa:secret@localhost/massa'
  SQLALCHEMY_ECHO = False
  
subject: Disable debug mode in default configuration.