Fix PEP257 issues

tests/components/rollershutter/test_command_line.py

@@ -1,8 +1,4 @@
-"""
-tests.components.rollershutter.command_line
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-Tests the command_line component
-"""
+"""The tests the Roller shutter command line platform."""
 
 import os
 import tempfile
@@ -16,7 +12,10 @@ from homeassistant.components.rollershutter import (
 
 
 class TestCommandRollerShutter(unittest.TestCase):
+    """Test the Roller shutter command line platform."""
+
     def setup_method(self, method):
+        """Setup things to be run when tests are started."""
         self.hass = ha.HomeAssistant()
         self.hass.config.latitude = 32.87336
         self.hass.config.longitude = 117.22743
@@ -26,15 +25,17 @@ class TestCommandRollerShutter(unittest.TestCase):
                                               None)  # FIXME
 
     def teardown_method(self, method):
-        """ Stop down stuff we started. """
+        """Stop down everything that was started."""
         self.hass.stop()
 
     def test_should_poll(self):
+        """Test the setting of polling."""
         self.assertTrue(self.rs.should_poll)
         self.rs._command_state = None
         self.assertFalse(self.rs.should_poll)
 
     def test_query_state_value(self):
+        """Test with state value."""
         with mock.patch('subprocess.check_output') as mock_run:
             mock_run.return_value = b' foo bar '
             result = self.rs._query_state_value('runme')
@@ -42,6 +43,7 @@ class TestCommandRollerShutter(unittest.TestCase):
             mock_run.assert_called_once_with('runme', shell=True)
 
     def test_state_value(self):
+        """Test with state value."""
         with tempfile.TemporaryDirectory() as tempdirname:
             path = os.path.join(tempdirname, 'rollershutter_status')
             test_rollershutter = {