Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 4a341ed..4b27424 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -951,7 +951,7 @@
HTTPException: message
TestResults(failed=1, attempted=2)
-But in Python 2 the module path is not included, an therefore a test must look
+But in Python 2 the module path is not included, and therefore a test must look
like the following test to succeed in Python 2. But that test will fail under
Python 3.