PR review fixes

Author: savannahostrowski

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
 
@@ -2756,7 +2757,7 @@ def _get_formatter(self):
 
     def _get_validation_formatter(self):
         # Return cached formatter for read-only validation operations
-        # (_expand_help and _format_args). Avoids repeated _set_color calls.
+        # (_expand_help and _format_args). Avoids repeated slow _set_color calls.
         if self._cached_formatter is None:
             self._cached_formatter = self._get_formatter()
         return self._cached_formatter