old_contents: """
  Configuration used by coaster test suite
  """
  SETTINGS_KEY = 'settings'
  ADMINS = ['test@example.com', ]
  DEFAULT_MAIL_SENDER = ('HasGeek', 'test@example.com')
  MAIL_SERVER = 'mail.example.com'
  MAIL_PORT = 587
  MAIL_USERNAME = 'username'
  MAIL_PASSWORD = 'PASSWORD'
  SECRET_KEY = 'd vldvnvnvjn'
  SQLALCHEMY_DATABASE_URI = 'postgresql://:@localhost:5432/coaster_test'
  
new_contents: """
  Note: This is a test config file used by test_app.py.
  """
  SETTINGS_KEY = 'settings'
  ADMINS = ['test@example.com', ]
  DEFAULT_MAIL_SENDER = ('HasGeek', 'test@example.com')
  MAIL_SERVER = 'mail.example.com'
  MAIL_PORT = 587
  MAIL_USERNAME = 'username'
  MAIL_PASSWORD = 'PASSWORD'
  SECRET_KEY = 'd vldvnvnvjn'
  SQLALCHEMY_DATABASE_URI = 'postgresql://:@localhost:5432/coaster_test'
  
subject: Add line about tests/settings.py being a test data and a real settings file.