Update docstrings

tests/test_bootstrap3.py

@@ -4,7 +4,7 @@
 
 
 class Bootstrap3Test(TestCase):
-    """Test Bootstrap3Renderer."""
+    """Test Bootstrap 3 Renderer."""
 
     def test_icons(self):
         self.assertEqual(

tests/test_fontawesome4.py

@@ -4,7 +4,7 @@
 
 
 class FontAwesome4Test(TestCase):
-    """Test FontAwesome4Renderer."""
+    """Test the FontAwesome 4 Renderer."""
 
     def test_icons(self):
         self.assertEqual(

tests/test_icon.py

@@ -1,5 +1,3 @@
-from unittest import TestCase
-
 from django.test import TestCase
 from django.utils import translation
 from django.utils.translation import gettext_lazy as _

tests/test_material.py

@@ -4,7 +4,7 @@
 
 
 class MaterialTest(TestCase):
-    """Test MaterialRenderer."""
+    """Test the Material Design Renderer."""
 
     def test_icons(self):
         self.assertEqual(

tests/test_utils.py

@@ -5,7 +5,7 @@
 
 
 class UtilsTest(TestCase):
-    """Test the Font Awesome Renderer."""
+    """Test the utility functions."""
 
     def test_get_setting(self):
         with self.settings(DJANGO_ICONS=None):