Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/test/test_mutants.py b/Lib/test/test_mutants.py
index 69c381e..c70106d 100644
--- a/Lib/test/test_mutants.py
+++ b/Lib/test/test_mutants.py
@@ -4,7 +4,7 @@
# From SF bug #422121: Insecurities in dict comparison.
-# Safety of code doing comparisons has been an historical Python weak spot.
+# Safety of code doing comparisons has been a historical Python weak spot.
# The problem is that comparison of structures written in C *naturally*
# wants to hold on to things like the size of the container, or "the
# biggest" containee so far, across a traversal of the container; but