Fix PEP257 issues

tests/components/test_shell_command.py

@@ -1,9 +1,4 @@
-"""
-tests.components.test_shell_command
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Tests Shell command component.
-"""
+"""The tests for the Shell command component."""
 import os
 import tempfile
 import unittest
@@ -16,17 +11,18 @@ from tests.common import get_test_home_assistant
 
 
 class TestShellCommand(unittest.TestCase):
-    """ Test the demo module. """
+    """Test the Shell command component."""
 
     def setUp(self):  # pylint: disable=invalid-name
+        """Setup things to be run when tests are started."""
         self.hass = get_test_home_assistant()
 
     def tearDown(self):  # pylint: disable=invalid-name
-        """ Stop down stuff we started. """
+        """Stop everything that was started."""
         self.hass.stop()
 
     def test_executing_service(self):
-        """ Test if able to call a configured service. """
+        """Test if able to call a configured service."""
         with tempfile.TemporaryDirectory() as tempdirname:
             path = os.path.join(tempdirname, 'called.txt')
             self.assertTrue(shell_command.setup(self.hass, {
@@ -41,13 +37,13 @@ class TestShellCommand(unittest.TestCase):
             self.assertTrue(os.path.isfile(path))
 
     def test_config_not_dict(self):
-        """ Test if config is not a dict. """
+        """Test if config is not a dict."""
         self.assertFalse(shell_command.setup(self.hass, {
             'shell_command': ['some', 'weird', 'list']
             }))
 
     def test_config_not_valid_service_names(self):
-        """ Test if config contains invalid service names. """
+        """Test if config contains invalid service names."""
         self.assertFalse(shell_command.setup(self.hass, {
             'shell_command': {
                 'this is invalid because space': 'touch bla.txt'
@@ -57,6 +53,7 @@ class TestShellCommand(unittest.TestCase):
            side_effect=SubprocessError)
     @patch('homeassistant.components.shell_command._LOGGER.error')
     def test_subprocess_raising_error(self, mock_call, mock_error):
+        """Test subprocess."""
         with tempfile.TemporaryDirectory() as tempdirname:
             path = os.path.join(tempdirname, 'called.txt')
             self.assertTrue(shell_command.setup(self.hass, {