Update docstrings (#7361)

* Update docstrings

* Update docstrings

* Update docstrings

* Update docstrings

* update docstrings

* Update docstrings

* Update docstrings

* Update docstrings

* Update docstrings

* Update docstrings

* Update tomato.py

* Update isy994.py

* Lint + fix tests

* Lint

homeassistant/components/binary_sensor/trend.py

@@ -6,22 +6,18 @@ https://home-assistant.io/components/sensor.trend/
 """
 import asyncio
 import logging
+
 import voluptuous as vol
 
 from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 
 from homeassistant.components.binary_sensor import (
-    BinarySensorDevice,
-    ENTITY_ID_FORMAT,
-    PLATFORM_SCHEMA,
+    BinarySensorDevice, ENTITY_ID_FORMAT, PLATFORM_SCHEMA,
     DEVICE_CLASSES_SCHEMA)
 from homeassistant.const import (
-    ATTR_FRIENDLY_NAME,
-    ATTR_ENTITY_ID,
-    CONF_SENSOR_CLASS,
-    CONF_DEVICE_CLASS,
-    STATE_UNKNOWN,)
+    ATTR_FRIENDLY_NAME, ATTR_ENTITY_ID, CONF_SENSOR_CLASS,
+    CONF_DEVICE_CLASS, STATE_UNKNOWN,)
 from homeassistant.helpers.deprecation import get_deprecated
 from homeassistant.helpers.entity import generate_entity_id
 from homeassistant.helpers.event import track_state_change
@@ -47,7 +43,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
 
 # pylint: disable=unused-argument
 def setup_platform(hass, config, add_devices, discovery_info=None):
-    """Setup the trend sensors."""
+    """Set up the trend sensors."""
     sensors = []
 
     for device, device_config in config[CONF_SENSORS].items():
@@ -60,13 +56,8 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
 
         sensors.append(
             SensorTrend(
-                hass,
-                device,
-                friendly_name,
-                entity_id,
-                attribute,
-                device_class,
-                invert)
+                hass, device, friendly_name, entity_id, attribute,
+                device_class, invert)
             )
     if not sensors:
         _LOGGER.error("No sensors added")
@@ -82,8 +73,8 @@ class SensorTrend(BinarySensorDevice):
                  target_entity, attribute, device_class, invert):
         """Initialize the sensor."""
         self._hass = hass
-        self.entity_id = generate_entity_id(ENTITY_ID_FORMAT, device_id,
-                                            hass=hass)
+        self.entity_id = generate_entity_id(
+            ENTITY_ID_FORMAT, device_id, hass=hass)
         self._name = friendly_name
         self._target_entity = target_entity
         self._attribute = attribute
@@ -95,7 +86,7 @@ class SensorTrend(BinarySensorDevice):
 
         @callback
         def trend_sensor_state_listener(entity, old_state, new_state):
-            """Called when the target device changes state."""
+            """Handle the target device state changes."""
             self.from_state = old_state
             self.to_state = new_state
             hass.async_add_job(self.async_update_ha_state(True))