Remove trailing whitespace.
diff --git a/Doc/tutorial/whatnow.rst b/Doc/tutorial/whatnow.rst
index 43b5e83..157cc9f 100644
--- a/Doc/tutorial/whatnow.rst
+++ b/Doc/tutorial/whatnow.rst
@@ -63,6 +63,6 @@
 
 .. Postings figure based on average of last six months activity as
    reported by www.egroups.com; Jan. 2000 - June 2000: 21272 msgs / 182
-   days = 116.9 msgs / day and steadily increasing. (XXX up to date figures?) 
+   days = 116.9 msgs / day and steadily increasing. (XXX up to date figures?)