[3.10] Fix typos in the Lib directory (GH-28775) (GH-28804)

Fix typos in the Lib directory as identified by codespell.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>.
(cherry picked from commit 745c9d9dfc1ad6fdfdf1d07420c6273ff67fa5be)

Co-authored-by: Christian Clauss <cclauss@me.com>
diff --git a/Lib/test/test_future.py b/Lib/test/test_future.py
index 4ef1123..5a3944e 100644
--- a/Lib/test/test_future.py
+++ b/Lib/test/test_future.py
@@ -329,7 +329,7 @@ def test_annotations(self):
 
     def test_fstring_debug_annotations(self):
         # f-strings with '=' don't round trip very well, so set the expected
-        # result explicitely.
+        # result explicitly.
         self.assertAnnotationEqual("f'{x=!r}'", expected="f'x={x!r}'")
         self.assertAnnotationEqual("f'{x=:}'", expected="f'x={x:}'")
         self.assertAnnotationEqual("f'{x=:.2f}'", expected="f'x={x:.2f}'")