old_contents: """Inspects dictionary for desired keys and stores for later usage."""
  
  from hostel_huptainer.errors import InputError
  
  
  class Environment(object):
      """Searches ``environment`` for expected variables and stores them."""
  
      def __init__(self, environment):
          self.hostname = environment.get('CERTBOT_HOSTNAME')
  
          if not self.hostname:
              raise InputError('CERTBOT_HOSTNAME environment variable is missing.')
  
new_contents: """Inspects dictionary for desired keys and stores for later usage."""
  
  from hostel_huptainer.errors import InputError
  
  
  class Environment(object):
      """Searches ``environment`` for expected variables and stores them."""
  
      def __init__(self, environment):
          self.hostname = environment.get('CERTBOT_HOSTNAME')
  
          if not self.hostname:
              raise InputError(
                  'CERTBOT_HOSTNAME environment variable is missing.')
  
subject: Decrease line length for pycodestyle compliance