convert shebang lines: python -> python3
diff --git a/Tools/scripts/crlf.py b/Tools/scripts/crlf.py
index 3dfa131..0622282 100755
--- a/Tools/scripts/crlf.py
+++ b/Tools/scripts/crlf.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 "Replace CRLF with LF in argument files.  Print names of changed files."
 
 import sys, os