convert shebang lines: python -> python3
diff --git a/Tools/scripts/lfcr.py b/Tools/scripts/lfcr.py
index 1b9a5b7..d094022 100755
--- a/Tools/scripts/lfcr.py
+++ b/Tools/scripts/lfcr.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 "Replace LF with CRLF in argument files.  Print names of changed files."