Fix typo

CHANGES.txt

@@ -18,7 +18,7 @@
   same time.  Specifying a log filename of ``syslog`` is still supported
   but deprecated.  Patch by Jason R. Coombs.
 
-- Environment variables are now be expanded for all config file options.
+- Environment variables are now expanded for all config file options.
   Patch by Dexter Tad-y.
 
 3.1.0-dev (Next 3.x Release)