Steven Bethard designated a new maintainer for argparse (GH-15605)

diff --git a/Lib/argparse.py b/Lib/argparse.py
index d29f161..ddfd772 100644
--- a/Lib/argparse.py
+++ b/Lib/argparse.py
@@ -1,4 +1,5 @@
 # Author: Steven J. Bethard <steven.bethard@gmail.com>.
+# New maintainer as of 29 August 2019:  Raymond Hettinger <raymond.hettinger@gmail.com>
 
 """Command-line parsing library