explain why literal != is used in asserts

Author: tomato42

src/ecdsa/test_eddsa.py

@@ -500,6 +500,7 @@ def test_equal_public_points(self):
         key2 = PublicKey(generator_ed25519, b"\x01" * 32)
 
         self.assertEqual(key1, key2)
+        # verify that `__ne__` works as expected
         self.assertFalse(key1 != key2)
 
     def test_unequal_public_points(self):
@@ -519,20 +520,23 @@ def test_unequal_publickey_curves(self):
         key2 = PublicKey(generator_ed448, b"\x03" * 56 + b"\x00")
 
         self.assertNotEqual(key1, key2)
+        # verify that `__ne__` works as expected
         self.assertTrue(key1 != key2)
 
     def test_equal_private_keys(self):
         key1 = PrivateKey(generator_ed25519, b"\x01" * 32)
         key2 = PrivateKey(generator_ed25519, b"\x01" * 32)
 
         self.assertEqual(key1, key2)
+        # verify that `__ne__` works as expected
         self.assertFalse(key1 != key2)
 
     def test_unequal_private_keys(self):
         key1 = PrivateKey(generator_ed25519, b"\x01" * 32)
         key2 = PrivateKey(generator_ed25519, b"\x02" * 32)
 
         self.assertNotEqual(key1, key2)
+        # verify that `__ne__` works as expected
         self.assertTrue(key1 != key2)
 
     def test_unequal_privatekey_to_string(self):