old_contents: """
  Support for tracking the moon phases.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/sensor.moon/
  """
  import asyncio
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.sensor import PLATFORM_SCHEMA
  from homeassistant.const import (CONF_NAME)
  import homeassistant.util.dt as dt_util
  from homeassistant.helpers.entity import Entity
  import homeassistant.helpers.config_validation as cv
  
  REQUIREMENTS = ['astral==1.3.4']
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_NAME = 'Moon'
  
  ICON = 'mdi:brightness-3'
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
  })
  
  
  @asyncio.coroutine
  def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
      """Set up the Moon sensor."""
      name = config.get(CONF_NAME)
  
      yield from async_add_devices([MoonSensor(name)], True)
      return True
  
  
  class MoonSensor(Entity):
      """Representation of a Moon sensor."""
  
      def __init__(self, name):
          """Initialize the sensor."""
          self._name = name
          self._state = None
  
      @property
      def name(self):
          """Return the name of the device."""
          return self._name
  
      @property
      def state(self):
          """Return the state of the device."""
          if self._state >= 21:
              return 'Last quarter'
          elif self._state >= 14:
              return 'Full moon'
          elif self._state >= 7:
              return 'First quarter'
          else:
              return 'New moon'
  
      @property
      def unit_of_measurement(self):
          """Return the unit the value is expressed in."""
          return 'Phase'
  
      @property
      def icon(self):
          """Icon to use in the frontend, if any."""
          return ICON
  
      @asyncio.coroutine
      def async_update(self):
          """Get the time and updates the states."""
          from astral import Astral
  
          today = dt_util.as_local(dt_util.utcnow()).date()
          self._state = Astral().moon_phase(today)
  
new_contents: """
  Support for tracking the moon phases.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/sensor.moon/
  """
  import asyncio
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.sensor import PLATFORM_SCHEMA
  from homeassistant.const import (CONF_NAME)
  import homeassistant.util.dt as dt_util
  from homeassistant.helpers.entity import Entity
  import homeassistant.helpers.config_validation as cv
  
  REQUIREMENTS = ['astral==1.3.4']
  
  _LOGGER = logging.getLogger(__name__)
  
  DEFAULT_NAME = 'Moon'
  
  ICON = 'mdi:brightness-3'
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
  })
  
  
  @asyncio.coroutine
  def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
      """Set up the Moon sensor."""
      name = config.get(CONF_NAME)
  
      yield from async_add_devices([MoonSensor(name)], True)
      return True
  
  
  class MoonSensor(Entity):
      """Representation of a Moon sensor."""
  
      def __init__(self, name):
          """Initialize the sensor."""
          self._name = name
          self._state = None
  
      @property
      def name(self):
          """Return the name of the device."""
          return self._name
  
      @property
      def state(self):
          """Return the state of the device."""
          if self._state >= 21:
              return 'Last quarter'
          elif self._state >= 14:
              return 'Full moon'
          elif self._state >= 7:
              return 'First quarter'
          else:
              return 'New moon'
  
      @property
      def icon(self):
          """Icon to use in the frontend, if any."""
          return ICON
  
      @asyncio.coroutine
      def async_update(self):
          """Get the time and updates the states."""
          from astral import Astral
  
          today = dt_util.as_local(dt_util.utcnow()).date()
          self._state = Astral().moon_phase(today)
  
subject: Remove unit of measurement