Note obsolescence
diff --git a/Tools/scripts/classfix.py b/Tools/scripts/classfix.py
index 09a9400..e676051 100755
--- a/Tools/scripts/classfix.py
+++ b/Tools/scripts/classfix.py
@@ -1,9 +1,13 @@
#! /usr/local/bin/python
+# This script is obsolete -- it is kept for historical purposes only.
+#
# Fix Python source files to use the new class definition syntax, i.e.,
+# the syntax used in Python versions before 0.9.8:
# class C() = base(), base(), ...: ...
-# is changed to
+# is changed to the current syntax:
# class C(base, base, ...): ...
+#
# The script uses heuristics to find class definitions that usually
# work but occasionally can fail; carefully check the output!
#