convert shebang lines: python -> python3
diff --git a/Lib/keyword.py b/Lib/keyword.py
index a7abe2b..a5974b5 100755
--- a/Lib/keyword.py
+++ b/Lib/keyword.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """Keywords (from "graminit.c")