convert shebang lines: python -> python3
diff --git a/Lib/http/cookies.py b/Lib/http/cookies.py
index 1051cdd..da30e25 100644
--- a/Lib/http/cookies.py
+++ b/Lib/http/cookies.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 
 ####