Fix some ChangeLog entries.

doc/lispref/ChangeLog

-2010-10-22  Eli Zaretskii  <eliz@gnu.org>
+2010-10-24  Eli Zaretskii  <eliz@gnu.org>
 
 	* display.texi (Window Systems): Deprecate use of window-system as
 	a predicate.

doc/misc/ChangeLog

@@ -2,7 +2,7 @@
 
 	* calc.texi:  Use emacsver.texi to determine Emacs version.
 
-2010-10-22  Juanma Barranquero  <lekktu@gmail.com>
+2010-10-24  Juanma Barranquero  <lekktu@gmail.com>
 
 	* gnus.texi (Group Parameters, Buttons): Fix typos.
 

etc/ChangeLog

@@ -3,11 +3,11 @@
 	* images/checked.xpm:
 	* images/unchecked.xpm: New images.
 
-2010-10-20  Richard Stallman  <rms@gnu.org>
+2010-10-24  Richard Stallman  <rms@gnu.org>
 
 	* DISTRIB: Update donation section.
 
-2010-10-20  Glenn Morris  <rgm@gnu.org>
+2010-10-24  Glenn Morris  <rgm@gnu.org>
 
 	* DISTRIB: Small updates.
 

lisp/erc/ChangeLog

-2010-10-23  Julien Danjou  <julien@danjou.info>
+2010-10-24  Julien Danjou  <julien@danjou.info>
 
 	* erc-backend.el (erc-server-JOIN): Set the correct target list on join.
 

lisp/org/ChangeLog

-2010-10-12  Juanma Barranquero  <lekktu@gmail.com>
-
-	* org-agenda.el (org-prefix-category-length)
-	(org-prefix-category-max-length): Fix typos in docstrings.
-
 2010-09-25  Juanma Barranquero  <lekktu@gmail.com>
 
 	* org.el (org-refile-targets):