old_contents: """Write data out to console."""
  
  from __future__ import print_function
  import sys
  
  
  def abnormal_exit():
      """Exits program under abnormal conditions."""
      sys.exit(1)
  
  
  def error_message(message):
      """Write message to STDERR, when message is valid."""
      if message:
          print('{}'.format(message), file=sys.stderr)
  
new_contents: """Write data out to console."""
  
  from __future__ import print_function
  import sys
  
  
  def abnormal_exit():
      """Exit program under abnormal conditions."""
      sys.exit(1)
  
  
  def error_message(message):
      """Write message to STDERR, when message is valid."""
      if message:
          print('{}'.format(message), file=sys.stderr)
  
subject: Make abnormal_exit docstring be in the imperative mood - pydocstyle