diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index b095783..9899a53 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -105,7 +105,8 @@
             code = sys.exc_info()[1].code
             stdout = sys.stdout.getvalue()
             stderr = sys.stderr.getvalue()
-            raise ArgumentParserError("SystemExit", stdout, stderr, code)
+            raise ArgumentParserError(
+                "SystemExit", stdout, stderr, code) from None
     finally:
         sys.stdout = old_stdout
         sys.stderr = old_stderr
diff --git a/Misc/ACKS b/Misc/ACKS
index b11ee9c..976c26e 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -312,6 +312,7 @@
 Chris Clark
 Diana Clarke
 Laurie Clark-Michalek
+Alexander Clarkson
 Mike Clarkson
 Andrew Clegg
 Brad Clements