convert shebang lines: python -> python3
diff --git a/Tools/i18n/msgfmt.py b/Tools/i18n/msgfmt.py
index 860e4ea..f481c88 100755
--- a/Tools/i18n/msgfmt.py
+++ b/Tools/i18n/msgfmt.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 # -*- coding: iso-8859-1 -*-
 # Written by Martin v. Löwis <loewis@informatik.hu-berlin.de>