convert shebang lines: python -> python3
diff --git a/Tools/scripts/find_recursionlimit.py b/Tools/scripts/find_recursionlimit.py
index 2e202be..b299bf5 100644
--- a/Tools/scripts/find_recursionlimit.py
+++ b/Tools/scripts/find_recursionlimit.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 """Find the maximum recursion limit that prevents interpreter termination.
 
 This script finds the maximum safe recursion limit on a particular