maint: update copyright dates

3 files changed, 4 insertions, 4 deletions

diff --git a/doc/Makefile.am b/doc/Makefile.am
index cabec21..300617e 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,6 +1,6 @@
 # Makefile for GNU diffutils documentation.
 
-# Copyright (C) 2001-2002, 2009-2013, 2015-2022 Free Software Foundation, Inc.
+# Copyright (C) 2001-2002, 2009-2013, 2015-2023 Free Software Foundation, Inc.
 
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
diff --git a/doc/diffutils.texi b/doc/diffutils.texi
index ac3be9d..e428646 100644
--- a/doc/diffutils.texi
+++ b/doc/diffutils.texi
@@ -14,7 +14,7 @@ and documents the GNU @command{diff}, @command{diff3},
 differences between files and the GNU @command{patch} command for
 using their output to update files.
 
-Copyright @copyright{} 1992--1994, 1998, 2001--2002, 2004, 2006, 2009--2022
+Copyright @copyright{} 1992--1994, 1998, 2001--2002, 2004, 2006, 2009--2023
 Free Software Foundation, Inc.
 
 @quotation
diff --git a/doc/fdl.texi b/doc/fdl.texi
index 9828e10..cffa98b 100644
--- a/doc/fdl.texi
+++ b/doc/fdl.texi
@@ -5,8 +5,8 @@
 @c hence no sectioning command or @node.
 
 @display
-Copyright @copyright{} 2000--2002, 2007--2008, 2022 Free Software Foundation,
-Inc.
+Copyright @copyright{} 2000--2002, 2007--2008, 2022--2023 Free Software
+Foundation, Inc.
 @uref{https://fsf.org/}
 
 Everyone is permitted to copy and distribute verbatim copies