[3.10] bpo-45060: Get rid of few uses of the equality operators with None (GH-28087). (GH-28092)

(cherry picked from commit 3c65457156d87e55010507d616b4eecb7a02883d)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index 316cf0b..6414f1a 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -344,7 +344,7 @@ def test_comparison(self):
         with self.assertRaises(TypeError): timezone(ZERO) < timezone(ZERO)
         self.assertIn(timezone(ZERO), {timezone(ZERO)})
         self.assertTrue(timezone(ZERO) != None)
-        self.assertFalse(timezone(ZERO) ==  None)
+        self.assertFalse(timezone(ZERO) == None)
 
         tz = timezone(ZERO)
         self.assertTrue(tz == ALWAYS_EQ)