maint: update copyright dates

4 files changed, 5 insertions, 4 deletions

diff --git a/doc/Makefile.am b/doc/Makefile.am
index bd28da80..4237af6e 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,7 +1,7 @@
 # Process this file with automake to create Makefile.in
 # Makefile.am for grep/doc.
 #
-# Copyright 2008-2022 Free Software Foundation, Inc.
+# Copyright 2008-2023 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/fdl.texi b/doc/fdl.texi
index eaf3da0e..84f45b0a 100644
--- a/doc/fdl.texi
+++ b/doc/fdl.texi
@@ -5,7 +5,8 @@
 @c hence no sectioning command or @node.
 
 @display
-Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+Copyright @copyright{} 2000--2002, 2007--2008, 2023 Free Software Foundation,
+Inc.
 @uref{https://fsf.org/}
 
 Everyone is permitted to copy and distribute verbatim copies
diff --git a/doc/grep.in.1 b/doc/grep.in.1
index 5b3123dd..90205ce9 100644
--- a/doc/grep.in.1
+++ b/doc/grep.in.1
@@ -1274,7 +1274,7 @@ This man page is maintained only fitfully;
 the full documentation is often more up-to-date.
 .
 .SH COPYRIGHT
-Copyright 1998-2000, 2002, 2005-2022 Free Software Foundation, Inc.
+Copyright 1998-2000, 2002, 2005-2023 Free Software Foundation, Inc.
 .PP
 This is free software;
 see the source for copying conditions.
diff --git a/doc/grep.texi b/doc/grep.texi
index a8089cc5..9b3aa031 100644
--- a/doc/grep.texi
+++ b/doc/grep.texi
@@ -30,7 +30,7 @@
 @copying
 This manual is for @command{grep}, a pattern matching engine.
 
-Copyright @copyright{} 1999--2002, 2005, 2008--2022 Free Software Foundation,
+Copyright @copyright{} 1999--2002, 2005, 2008--2023 Free Software Foundation,
 Inc.
 
 @quotation