Apply shell shebang for python files before the copyright
diff --git a/src/test/cli/ast.py b/src/test/cli/ast.py
old mode 100644
new mode 100755
index fd5dfdb..89ff492
--- a/src/test/cli/ast.py
+++ b/src/test/cli/ast.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 """
     ast