old_contents: import os.path
  
  # The email address for your GCS service account being used for signatures.
  SERVICE_ACCOUNT_EMAIL = ('abcdef1234567890@developer.gserviceaccount.com')
  
  # Bucket name to use for writing example file.
  BUCKET_NAME = 'bucket-name'
  # Object name to use for writing example file.
  OBJECT_NAME = 'object.txt'
  
  # Set this to the path of your service account private key file, in DER format.
  #
  # PyCrypto requires using the DER key format, but GCS provides key files in
  # pkcs12 format. To convert between formats, you can use the provided commands
  # below.
  #
  # Given a GCS key in pkcs12 format, convert it to PEM using this command:
  #   openssl pkcs12 -in path/to/key.p12 -nodes -nocerts > path/to/key.pem
  # Given a GCS key in PEM format, convert it to DER format using this command:
  #   openssl rsa -in privatekey.pem -inform PEM -out privatekey.der -outform DER
  PRIVATE_KEY_PATH = os.path.join(os.path.dirname(__file__), 'privatekey.der')
  
new_contents: import os.path
  
  # The email address for your GCS service account being used for signatures.
  SERVICE_ACCOUNT_EMAIL = ('abcdef1234567890@developer.gserviceaccount.com')
  
  # Bucket name to use for writing example file.
  BUCKET_NAME = 'bucket-name'
  # Object name to use for writing example file.
  OBJECT_NAME = 'object.txt'
  
  # Set this to the path of your service account private key file, in DER format.
  #
  # PyCrypto requires using the DER key format, but GCS provides key files in
  # pkcs12 format. To convert between formats, you can use the provided commands
  # below.
  #
  # The default password for p12 file is `notasecret`
  # 
  # Given a GCS key in pkcs12 format, convert it to PEM using this command:
  #   openssl pkcs12 -in path/to/key.p12 -nodes -nocerts > path/to/key.pem
  # Given a GCS key in PEM format, convert it to DER format using this command:
  #   openssl rsa -in privatekey.pem -inform PEM -out privatekey.der -outform DER
  PRIVATE_KEY_PATH = os.path.join(os.path.dirname(__file__), 'privatekey.der')
  
subject: Add a help line