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[gnu-emacs] / lisp / abbrev.el

diff --git a/lisp/abbrev.el b/lisp/abbrev.el
index e8e89e92f405588d9675eef8d586ea77a85d0e08..0e8b2cf9e8a0925568fb58d1d55a20cd1e767ef8 100644 (file)
--- a/lisp/abbrev.el
+++ b/lisp/abbrev.el
@@ -1,7 +1,7 @@
 ;;; abbrev.el --- abbrev mode commands for Emacs
 
 ;; Copyright (C) 1985, 1986, 1987, 1992, 2001, 2002, 2003, 2004,
-;;   2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+;;   2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
 
 ;; Maintainer: FSF
 ;; Keywords: abbrev convenience
@@ -530,8 +530,9 @@ EXPANSION should usually be a string.
 To undefine an abbrev, define it with EXPANSION = nil.
 If HOOK is non-nil, it should be a function of no arguments;
 it is called after EXPANSION is inserted.
-If EXPANSION is not a string, the abbrev is a special one,
- which does not expand in the usual way but only runs HOOK.
+If EXPANSION is not a string (and not nil), the abbrev is a
+ special one, which does not expand in the usual way but only
+ runs HOOK.
 
 PROPS is a property list.  The following properties are special:
 - `:count': the value for the abbrev's usage-count, which is incremented each