old_contents: """
  homeassistant.components.notify
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  Provides functionality to notify people.
  """
  import logging
  
  from homeassistant.loader import get_component
  from homeassistant.helpers import validate_config
  
  from homeassistant.const import CONF_PLATFORM
  
  DOMAIN = "notify"
  DEPENDENCIES = []
  
  # Title of notification
  ATTR_TITLE = "title"
  ATTR_TITLE_DEFAULT = "Home Assistant"
  
  # Text to notify user of
  ATTR_MESSAGE = "message"
  
  SERVICE_NOTIFY = "notify"
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def send_message(hass, message):
      """ Send a notification message. """
      hass.services.call(DOMAIN, SERVICE_NOTIFY, {ATTR_MESSAGE: message})
  
  
  def setup(hass, config):
      """ Sets up notify services. """
  
      if not validate_config(config, {DOMAIN: [CONF_PLATFORM]}, _LOGGER):
          return False
  
      platform = config[DOMAIN].get(CONF_PLATFORM)
  
      notify_implementation = get_component(
          'notify.{}'.format(platform))
  
      if notify_implementation is None:
          _LOGGER.error("Unknown notification service specified.")
  
          return False
  
      notify_service = notify_implementation.get_service(hass, config)
  
      if notify_service is None:
          _LOGGER.error("Failed to initialize notification service %s",
                        platform)
  
          return False
  
      def notify_message(call):
          """ Handle sending notification message service calls. """
          message = call.data.get(ATTR_MESSAGE)
  
          if message is None:
              return
  
          title = call.data.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
  
          notify_service.send_message(message, title=title)
  
      hass.services.register(DOMAIN, SERVICE_NOTIFY, notify_message)
  
      return True
  
  
  # pylint: disable=too-few-public-methods
  class BaseNotificationService(object):
      """ Provides an ABC for notifcation services. """
  
      def send_message(self, message, **kwargs):
          """
          Send a message.
          kwargs can contain ATTR_TITLE to specify a title.
          """
          raise NotImplementedError
  
new_contents: """
  homeassistant.components.notify
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  Provides functionality to notify people.
  """
  import logging
  
  from homeassistant.loader import get_component
  from homeassistant.helpers import validate_config
  
  from homeassistant.const import CONF_PLATFORM
  
  DOMAIN = "notify"
  DEPENDENCIES = []
  
  # Title of notification
  ATTR_TITLE = "title"
  ATTR_TITLE_DEFAULT = "Home Assistant"
  
  # Text to notify user of
  ATTR_MESSAGE = "message"
  
  SERVICE_NOTIFY = "notify"
  
  _LOGGER = logging.getLogger(__name__)
  
  
  def send_message(hass, message):
      """ Send a notification message. """
      hass.services.call(DOMAIN, SERVICE_NOTIFY, {ATTR_MESSAGE: message})
  
  
  def setup(hass, config):
      """ Sets up notify services. """
  
      if not validate_config(config, {DOMAIN: [CONF_PLATFORM]}, _LOGGER):
          return False
  
      platform = config[DOMAIN].get(CONF_PLATFORM)
  
      notify_implementation = get_component(
          'notify.{}'.format(platform))
  
      if notify_implementation is None:
          _LOGGER.error("Unknown notification service specified.")
  
          return False
  
      notify_service = notify_implementation.get_service(hass, config)
  
      if notify_service is None:
          _LOGGER.error("Failed to initialize notification service %s",
                        platform)
  
          return False
  
      def notify_message(call):
          """ Handle sending notification message service calls. """
          message = call.data.get(ATTR_MESSAGE)
  
          if message is None:
              return
  
          title = call.data.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
  
          notify_service.send_message(message, title=title)
  
      hass.services.register(DOMAIN, SERVICE_NOTIFY, notify_message)
  
      return True
  
  
  # pylint: disable=too-few-public-methods
  class BaseNotificationService(object):
      """ Provides an ABC for notification services. """
  
      def send_message(self, message, **kwargs):
          """
          Send a message.
          kwargs can contain ATTR_TITLE to specify a title.
          """
          raise NotImplementedError
  
subject: fix typo