Fix PEP257 issues

tests/components/lock/test_demo.py

@@ -1,9 +1,4 @@
-"""
-tests.components.lock.test_demo
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Tests demo lock component.
-"""
+"""The tests for the Demo lock platform."""
 import unittest
 
 from homeassistant.components import lock
@@ -16,9 +11,10 @@ KITCHEN = 'lock.kitchen_door'
 
 
 class TestLockDemo(unittest.TestCase):
-    """ Test the demo lock. """
+    """Test the demo lock."""
 
     def setUp(self):  # pylint: disable=invalid-name
+        """Setup things to be run when tests are started."""
         self.hass = get_test_home_assistant()
         self.assertTrue(lock.setup(self.hass, {
             'lock': {
@@ -27,10 +23,11 @@ class TestLockDemo(unittest.TestCase):
         }))
 
     def tearDown(self):  # pylint: disable=invalid-name
-        """ Stop down stuff we started. """
+        """Stop everything that was started."""
         self.hass.stop()
 
     def test_is_locked(self):
+        """Test if lock is locked."""
         self.assertTrue(lock.is_locked(self.hass, FRONT))
         self.hass.states.is_state(FRONT, 'locked')
 
@@ -38,15 +35,15 @@ class TestLockDemo(unittest.TestCase):
         self.hass.states.is_state(KITCHEN, 'unlocked')
 
     def test_locking(self):
+        """Test the locking of a lock."""
         lock.lock(self.hass, KITCHEN)
-
         self.hass.pool.block_till_done()
 
         self.assertTrue(lock.is_locked(self.hass, KITCHEN))
 
     def test_unlocking(self):
+        """Test the unlocking of a lock."""
         lock.unlock(self.hass, FRONT)
-
         self.hass.pool.block_till_done()
 
         self.assertFalse(lock.is_locked(self.hass, FRONT))