convert shebang lines: python -> python3
diff --git a/Lib/test/test_cmd.py b/Lib/test/test_cmd.py
index f102fe0..11602f1 100644
--- a/Lib/test/test_cmd.py
+++ b/Lib/test/test_cmd.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """
 Test script for the 'cmd' module
 Original by Michael Schneider