Rename the -D option to -Q, to avoid a Jython option name conflict.
diff --git a/Tools/scripts/fixdiv.py b/Tools/scripts/fixdiv.py
index 616622b..175d77b 100755
--- a/Tools/scripts/fixdiv.py
+++ b/Tools/scripts/fixdiv.py
@@ -2,7 +2,7 @@
"""fixdiv - tool to fix division operators.
-To use this tool, first run `python -Dwarn yourscript.py 2>warnings'.
+To use this tool, first run `python -Qwarn yourscript.py 2>warnings'.
This runs the script `yourscript.py' while writing warning messages
about all uses of the classic division operator to the file
`warnings'. The warnings look like this: