convert shebang lines: python -> python3
diff --git a/Tools/scripts/cvsfiles.py b/Tools/scripts/cvsfiles.py
index 9e65dc8..0fc13bb 100755
--- a/Tools/scripts/cvsfiles.py
+++ b/Tools/scripts/cvsfiles.py
@@ -1,4 +1,4 @@
-#! /usr/bin/env python
+#! /usr/bin/env python3
 
 """Print a list of files that are mentioned in CVS directories.