convert shebang lines: python -> python3
diff --git a/Tools/i18n/pygettext.py b/Tools/i18n/pygettext.py
index d4ea597..67a960f 100755
--- a/Tools/i18n/pygettext.py
+++ b/Tools/i18n/pygettext.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 # -*- coding: iso-8859-1 -*-
 # Originally written by Barry Warsaw <barry@zope.com>
 #