Correct description of exitcodes in changelog

Author: mnaberez

CHANGES.txt

@@ -20,10 +20,9 @@
   that file.  Thanks to Alex Eftimie and Zoltan Toth-Czifra for the patches.
 
 - The default value for the config file setting ``exitcodes=``, the expected
-  successful exit codes of a program, has changed.  In previous versions, it
-  was ``0,2``.  This caused issues with Golang programs where ``panic()``
-  causes the exit code to be ``2``.  The default value for ``exitcodes``
-  is now ``0``.
+  exit codes of a program, has changed.  In previous versions, it was ``0,2``.
+  This caused issues with Golang programs where ``panic()`` causes the exit
+  code to be ``2``.  The default value for ``exitcodes`` is now ``0``.
 
 - An undocumented feature where multiple ``supervisorctl`` commands could be
   combined on a single line separated by semicolons has been removed.