[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_tempfile.py b/Lib/test/test_tempfile.py
index f1d4837..96946a2 100644
--- a/Lib/test/test_tempfile.py
+++ b/Lib/test/test_tempfile.py
@@ -1435,7 +1435,7 @@ def test_explict_cleanup_ignore_errors(self):
             self.assertEqual(
                 temp_path.exists(),
                 sys.platform.startswith("win"),
-                f"TemporaryDirectory {temp_path!s} existance state unexpected")
+                f"TemporaryDirectory {temp_path!s} existence state unexpected")
             temp_dir.cleanup()
             self.assertFalse(
                 temp_path.exists(),
@@ -1494,7 +1494,7 @@ def test_del_on_collection_ignore_errors(self):
             self.assertEqual(
                 temp_path.exists(),
                 sys.platform.startswith("win"),
-                f"TemporaryDirectory {temp_path!s} existance state unexpected")
+                f"TemporaryDirectory {temp_path!s} existence state unexpected")
 
     def test_del_on_shutdown(self):
         # A TemporaryDirectory may be cleaned up during shutdown
@@ -1559,7 +1559,7 @@ def test_del_on_shutdown_ignore_errors(self):
             self.assertEqual(
                 temp_path.exists(),
                 sys.platform.startswith("win"),
-                f"TemporaryDirectory {temp_path!s} existance state unexpected")
+                f"TemporaryDirectory {temp_path!s} existence state unexpected")
             err = err.decode('utf-8', 'backslashreplace')
             self.assertNotIn("Exception", err)
             self.assertNotIn("Error", err)