Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index 57d5e06..efc40cf 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -47,7 +47,7 @@
         self.assertEqual(r.bytebuffer, "")
         self.assertEqual(r.charbuffer, u"")
 
-        # do the check again, this time using a incremental decoder
+        # do the check again, this time using an incremental decoder
         d = codecs.getincrementaldecoder(self.encoding)()
         result = u""
         for (c, partialresult) in zip(input.encode(self.encoding), partialresults):