Fix typo in module docstring.
diff --git a/Tools/scripts/cleanfuture.py b/Tools/scripts/cleanfuture.py
index ebb9e5d..3f2da3a 100644
--- a/Tools/scripts/cleanfuture.py
+++ b/Tools/scripts/cleanfuture.py
@@ -18,7 +18,7 @@
cleanfuture finds nothing to change, the file is left alone. If cleanfuture
does change a file, the changed file is a fixed-point (i.e., running
cleanfuture on the resulting .py file won't change it again, at least not
-until you try it again with a m later Python release).
+until you try it again with a later Python release).
Limitations: You can do these things, but this tool won't help you then: