gbranden pushed a commit to branch master
in repository groff.

commit 46234aad5fd4265b70e7a36412ed2cb7b500779f
Author: G. Branden Robinson <[email protected]>
AuthorDate: Fri Nov 14 09:43:34 2025 -0600

    [libgroff]: Drop ersatz copyright symbol '(C)'.
    
    Software developers have long labored under the no-longer-correct
    misconception that omitting a copyright symbol from one's notice was a
    fatal defect that effectively placed the work in the public domain.
    That stopped being true as of 1 March 1989.[1]  Further, prior to
    guidance issued by the U.S. Copyright Office in the decades since, the
    use of "(C)" as a substitute for a copyright sign _may not have
    sufficed_ to prevent the copyright notice from being regarded as
    defective.  The Copyright Office, then and now, prefers the abbreviation
    "copr." when © is typographically unavailable.[ibid.]  Nowadays, its
    advice is that "c" (note lowercase) is an "acceptable variant", that
    _may_ retain the efficacy of the copyright notice.  The word
    "copyright", spelled out in full, also suffices per that resource, and
    is already present in this notice.
    
    [1] https://www.copyright.gov/circs/circ03.pdf
---
 src/libs/libgroff/change_lf.cpp   | 2 +-
 src/libs/libgroff/cmap.cpp        | 2 +-
 src/libs/libgroff/color.cpp       | 2 +-
 src/libs/libgroff/config.charset  | 2 +-
 src/libs/libgroff/cset.cpp        | 2 +-
 src/libs/libgroff/curtime.cpp     | 2 +-
 src/libs/libgroff/device.cpp      | 2 +-
 src/libs/libgroff/errarg.cpp      | 2 +-
 src/libs/libgroff/error.cpp       | 2 +-
 src/libs/libgroff/fatal.cpp       | 2 +-
 src/libs/libgroff/filename.cpp    | 2 +-
 src/libs/libgroff/font.cpp        | 2 +-
 src/libs/libgroff/fontfile.cpp    | 2 +-
 src/libs/libgroff/geometry.cpp    | 2 +-
 src/libs/libgroff/getcwd.c        | 2 +-
 src/libs/libgroff/glyphuni.cpp    | 2 +-
 src/libs/libgroff/htmlhint.cpp    | 2 +-
 src/libs/libgroff/hypot.cpp       | 2 +-
 src/libs/libgroff/iftoa.c         | 2 +-
 src/libs/libgroff/invalid.cpp     | 2 +-
 src/libs/libgroff/itoa.c          | 2 +-
 src/libs/libgroff/json_encode.cpp | 2 +-
 src/libs/libgroff/lf.cpp          | 2 +-
 src/libs/libgroff/libgroff.am     | 2 +-
 src/libs/libgroff/lineno.cpp      | 2 +-
 src/libs/libgroff/localcharset.c  | 2 +-
 src/libs/libgroff/macropath.cpp   | 2 +-
 src/libs/libgroff/make-uniuni     | 4 ++--
 src/libs/libgroff/matherr.c       | 2 +-
 src/libs/libgroff/maxfilename.cpp | 2 +-
 src/libs/libgroff/maxpathname.cpp | 2 +-
 src/libs/libgroff/mksdir.cpp      | 2 +-
 src/libs/libgroff/mkstemp.cpp     | 2 +-
 src/libs/libgroff/nametoindex.cpp | 2 +-
 src/libs/libgroff/new.cpp         | 2 +-
 src/libs/libgroff/paper.cpp       | 2 +-
 src/libs/libgroff/prime.cpp       | 2 +-
 src/libs/libgroff/progname.c      | 2 +-
 src/libs/libgroff/ptable.cpp      | 2 +-
 src/libs/libgroff/quotearg.c      | 2 +-
 src/libs/libgroff/ref-add.sin     | 2 +-
 src/libs/libgroff/ref-del.sin     | 2 +-
 src/libs/libgroff/relocatable.h   | 2 +-
 src/libs/libgroff/relocate.cpp    | 2 +-
 src/libs/libgroff/searchpath.cpp  | 2 +-
 src/libs/libgroff/spawnvp.c       | 2 +-
 src/libs/libgroff/string.cpp      | 2 +-
 src/libs/libgroff/strsave.cpp     | 2 +-
 src/libs/libgroff/strtol.c        | 2 +-
 src/libs/libgroff/symbol.cpp      | 2 +-
 src/libs/libgroff/tmpfile.cpp     | 2 +-
 src/libs/libgroff/tmpname.cpp     | 2 +-
 src/libs/libgroff/unicode.cpp     | 2 +-
 src/libs/libgroff/uniglyph.cpp    | 2 +-
 src/libs/libgroff/uniuni.cpp      | 2 +-
 55 files changed, 56 insertions(+), 56 deletions(-)

diff --git a/src/libs/libgroff/change_lf.cpp b/src/libs/libgroff/change_lf.cpp
index f06b6d545..c87d266d3 100644
--- a/src/libs/libgroff/change_lf.cpp
+++ b/src/libs/libgroff/change_lf.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/cmap.cpp b/src/libs/libgroff/cmap.cpp
index 0eee1f7f3..a53661b1a 100644
--- a/src/libs/libgroff/cmap.cpp
+++ b/src/libs/libgroff/cmap.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/color.cpp b/src/libs/libgroff/color.cpp
index 2f8ba830a..752e5b631 100644
--- a/src/libs/libgroff/color.cpp
+++ b/src/libs/libgroff/color.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2024 Free Software Foundation, Inc.
+/* Copyright 2001-2024 Free Software Foundation, Inc.
      Written by Gaius Mulley <[email protected]>
 
 This file is part of groff.
diff --git a/src/libs/libgroff/config.charset b/src/libs/libgroff/config.charset
index ad9d14ae8..1364932b6 100755
--- a/src/libs/libgroff/config.charset
+++ b/src/libs/libgroff/config.charset
@@ -1,7 +1,7 @@
 #!/bin/sh
 # Output a system dependent table of character encoding aliases.
 #
-#   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+#   Copyright 2000-2020 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/src/libs/libgroff/cset.cpp b/src/libs/libgroff/cset.cpp
index 03dc5cf19..944a0eddd 100644
--- a/src/libs/libgroff/cset.cpp
+++ b/src/libs/libgroff/cset.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/curtime.cpp b/src/libs/libgroff/curtime.cpp
index 45ee70206..d808a48c7 100644
--- a/src/libs/libgroff/curtime.cpp
+++ b/src/libs/libgroff/curtime.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015-2020 Free Software Foundation, Inc.
+/* Copyright 2015-2020 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/device.cpp b/src/libs/libgroff/device.cpp
index 6fd6006af..044bac688 100644
--- a/src/libs/libgroff/device.cpp
+++ b/src/libs/libgroff/device.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/errarg.cpp b/src/libs/libgroff/errarg.cpp
index 99fc0fa68..8f3e0ed98 100644
--- a/src/libs/libgroff/errarg.cpp
+++ b/src/libs/libgroff/errarg.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/error.cpp b/src/libs/libgroff/error.cpp
index fd1de6b6b..c86f3b77b 100644
--- a/src/libs/libgroff/error.cpp
+++ b/src/libs/libgroff/error.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/fatal.cpp b/src/libs/libgroff/fatal.cpp
index 4ba42f31b..af3237b3b 100644
--- a/src/libs/libgroff/fatal.cpp
+++ b/src/libs/libgroff/fatal.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/filename.cpp b/src/libs/libgroff/filename.cpp
index ded9738ec..bf8a6c8b3 100644
--- a/src/libs/libgroff/filename.cpp
+++ b/src/libs/libgroff/filename.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014-2022 Free Software Foundation, Inc.
+/* Copyright 2014-2022 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/font.cpp b/src/libs/libgroff/font.cpp
index faef870fe..0abca2e61 100644
--- a/src/libs/libgroff/font.cpp
+++ b/src/libs/libgroff/font.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/fontfile.cpp b/src/libs/libgroff/fontfile.cpp
index a25118b06..15d810ea0 100644
--- a/src/libs/libgroff/fontfile.cpp
+++ b/src/libs/libgroff/fontfile.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2024 Free Software Foundation, Inc.
+/* Copyright 1989-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/geometry.cpp b/src/libs/libgroff/geometry.cpp
index dfbf1a8b6..a87192963 100644
--- a/src/libs/libgroff/geometry.cpp
+++ b/src/libs/libgroff/geometry.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by Gaius Mulley <[email protected]>
      using adjust_arc_center() from printer.cpp, written by James Clark.
 
diff --git a/src/libs/libgroff/getcwd.c b/src/libs/libgroff/getcwd.c
index 0394653d3..d4d8451ee 100644
--- a/src/libs/libgroff/getcwd.c
+++ b/src/libs/libgroff/getcwd.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
+/* Copyright 2000-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/glyphuni.cpp b/src/libs/libgroff/glyphuni.cpp
index 2de37f50c..8ae63a24a 100644
--- a/src/libs/libgroff/glyphuni.cpp
+++ b/src/libs/libgroff/glyphuni.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
+/* Copyright 2002-2024 Free Software Foundation, Inc.
      Written by Werner Lemberg <[email protected]>
 
 This file is part of groff.
diff --git a/src/libs/libgroff/htmlhint.cpp b/src/libs/libgroff/htmlhint.cpp
index 78a4d7eb6..a5de9a6a1 100644
--- a/src/libs/libgroff/htmlhint.cpp
+++ b/src/libs/libgroff/htmlhint.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2024 Free Software Foundation, Inc.
+/* Copyright 2000-2024 Free Software Foundation, Inc.
      Written by Gaius Mulley ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/hypot.cpp b/src/libs/libgroff/hypot.cpp
index 597316383..4b3db323c 100644
--- a/src/libs/libgroff/hypot.cpp
+++ b/src/libs/libgroff/hypot.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2005-2020 Free Software Foundation, Inc.
+/* Copyright 2005-2020 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
diff --git a/src/libs/libgroff/iftoa.c b/src/libs/libgroff/iftoa.c
index 6d89ad736..8b3b632ed 100644
--- a/src/libs/libgroff/iftoa.c
+++ b/src/libs/libgroff/iftoa.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2024 Free Software Foundation, Inc.
+/* Copyright 1989-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/invalid.cpp b/src/libs/libgroff/invalid.cpp
index 24d36aa5a..8f0fb1522 100644
--- a/src/libs/libgroff/invalid.cpp
+++ b/src/libs/libgroff/invalid.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000-2024 Free Software Foundation, Inc.
+/* Copyright 2000-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/itoa.c b/src/libs/libgroff/itoa.c
index 7620382de..aee84c9d4 100644
--- a/src/libs/libgroff/itoa.c
+++ b/src/libs/libgroff/itoa.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2024 Free Software Foundation, Inc.
+/* Copyright 1989-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/json_encode.cpp 
b/src/libs/libgroff/json_encode.cpp
index 46905ecd4..3f66f2a79 100644
--- a/src/libs/libgroff/json_encode.cpp
+++ b/src/libs/libgroff/json_encode.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2025 G. Branden Robinson
+/* Copyright 2025 G. Branden Robinson
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/lf.cpp b/src/libs/libgroff/lf.cpp
index bfb3c5c25..b6b8ab40f 100644
--- a/src/libs/libgroff/lf.cpp
+++ b/src/libs/libgroff/lf.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/libgroff.am b/src/libs/libgroff/libgroff.am
index 8a0721e79..99c593f04 100644
--- a/src/libs/libgroff/libgroff.am
+++ b/src/libs/libgroff/libgroff.am
@@ -1,4 +1,4 @@
-# Copyright (C) 2014-2025 Free Software Foundation, Inc.
+# Copyright 2014-2025 Free Software Foundation, Inc.
 #
 # This file is part of groff.
 #
diff --git a/src/libs/libgroff/lineno.cpp b/src/libs/libgroff/lineno.cpp
index 6e356c7bb..95beb5fbd 100644
--- a/src/libs/libgroff/lineno.cpp
+++ b/src/libs/libgroff/lineno.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+/* Copyright 2014-2020 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/localcharset.c b/src/libs/libgroff/localcharset.c
index f98fc62f8..3bc73ee7e 100644
--- a/src/libs/libgroff/localcharset.c
+++ b/src/libs/libgroff/localcharset.c
@@ -1,6 +1,6 @@
 /* Determine a canonical name for the current locale's character encoding.
 
-   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+   Copyright 2000-2020 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/src/libs/libgroff/macropath.cpp b/src/libs/libgroff/macropath.cpp
index 84a713a8c..7249a8d66 100644
--- a/src/libs/libgroff/macropath.cpp
+++ b/src/libs/libgroff/macropath.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2024 Free Software Foundation, Inc.
+/* Copyright 1989-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/make-uniuni b/src/libs/libgroff/make-uniuni
index c14ca170e..bfc457c22 100755
--- a/src/libs/libgroff/make-uniuni
+++ b/src/libs/libgroff/make-uniuni
@@ -2,7 +2,7 @@
 #
 # make-uniuni -- script for creating the file uniuni.cpp
 #
-# Copyright (C) 2005-2024 Free Software Foundation, Inc.
+# Copyright 2005-2024 Free Software Foundation, Inc.
 #      Written by Werner Lemberg <[email protected]>
 #
 # This file is part of groff.
@@ -67,7 +67,7 @@ cat $$3 \
 
 # Write preamble.
 cat <<END
-/* Copyright (C) 2002-2024  Free Software Foundation, Inc.
+/* Copyright 2002-2024  Free Software Foundation, Inc.
      Written by Werner Lemberg <[email protected]>
 
 This file is part of groff.
diff --git a/src/libs/libgroff/matherr.c b/src/libs/libgroff/matherr.c
index 3c0340f01..57a3fe913 100644
--- a/src/libs/libgroff/matherr.c
+++ b/src/libs/libgroff/matherr.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/maxfilename.cpp 
b/src/libs/libgroff/maxfilename.cpp
index bd40b95d8..6be0c6ec3 100644
--- a/src/libs/libgroff/maxfilename.cpp
+++ b/src/libs/libgroff/maxfilename.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2024 Free Software Foundation, Inc.
+/* Copyright 1992-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/maxpathname.cpp 
b/src/libs/libgroff/maxpathname.cpp
index 7cc736c8f..6f7354b98 100644
--- a/src/libs/libgroff/maxpathname.cpp
+++ b/src/libs/libgroff/maxpathname.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2005-2024 Free Software Foundation, Inc.
+/* Copyright 2005-2024 Free Software Foundation, Inc.
      Written by Werner Lemberg ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/mksdir.cpp b/src/libs/libgroff/mksdir.cpp
index 5fa6d28ce..129ede9ec 100644
--- a/src/libs/libgroff/mksdir.cpp
+++ b/src/libs/libgroff/mksdir.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
+/* Copyright 2001-2020 Free Software Foundation, Inc.
      Written by Werner Lemberg ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/mkstemp.cpp b/src/libs/libgroff/mkstemp.cpp
index 089a10a07..150131f9f 100644
--- a/src/libs/libgroff/mkstemp.cpp
+++ b/src/libs/libgroff/mkstemp.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
+/* Copyright 2001-2020 Free Software Foundation, Inc.
      Written by Werner Lemberg ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/nametoindex.cpp 
b/src/libs/libgroff/nametoindex.cpp
index 88ba1532d..9c15fdd04 100644
--- a/src/libs/libgroff/nametoindex.cpp
+++ b/src/libs/libgroff/nametoindex.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/new.cpp b/src/libs/libgroff/new.cpp
index 73b24efd9..331121476 100644
--- a/src/libs/libgroff/new.cpp
+++ b/src/libs/libgroff/new.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/paper.cpp b/src/libs/libgroff/paper.cpp
index e14b0dd14..5916fb5ff 100644
--- a/src/libs/libgroff/paper.cpp
+++ b/src/libs/libgroff/paper.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
+/* Copyright 2002-2024 Free Software Foundation, Inc.
      Written by Werner Lemberg ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/prime.cpp b/src/libs/libgroff/prime.cpp
index 485f7b95d..889da2c9f 100644
--- a/src/libs/libgroff/prime.cpp
+++ b/src/libs/libgroff/prime.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+/* Copyright 2014-2020 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/progname.c b/src/libs/libgroff/progname.c
index f4320c192..f48ffef4b 100644
--- a/src/libs/libgroff/progname.c
+++ b/src/libs/libgroff/progname.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+/* Copyright 2014-2020 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/ptable.cpp b/src/libs/libgroff/ptable.cpp
index 18626137f..05e9fa635 100644
--- a/src/libs/libgroff/ptable.cpp
+++ b/src/libs/libgroff/ptable.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/quotearg.c b/src/libs/libgroff/quotearg.c
index 9ac565cb7..5522a4420 100644
--- a/src/libs/libgroff/quotearg.c
+++ b/src/libs/libgroff/quotearg.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004-2020 Free Software Foundation, Inc.
+/* Copyright 2004-2020 Free Software Foundation, Inc.
      Written by:  Jeff Conrad    ([email protected])
        and        Keith Marshall ([email protected])
 
diff --git a/src/libs/libgroff/ref-add.sin b/src/libs/libgroff/ref-add.sin
index 50aa7d137..436297dfd 100644
--- a/src/libs/libgroff/ref-add.sin
+++ b/src/libs/libgroff/ref-add.sin
@@ -1,6 +1,6 @@
 # Add this package to a list of references stored in a text file.
 #
-#   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+#   Copyright 2000-2020 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/src/libs/libgroff/ref-del.sin b/src/libs/libgroff/ref-del.sin
index 16014696c..faa01ce9a 100644
--- a/src/libs/libgroff/ref-del.sin
+++ b/src/libs/libgroff/ref-del.sin
@@ -1,6 +1,6 @@
 # Remove this package from a list of references stored in a text file.
 #
-#   Copyright (C) 2000-2020 Free Software Foundation, Inc.
+#   Copyright 2000-2020 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/src/libs/libgroff/relocatable.h b/src/libs/libgroff/relocatable.h
index f15219488..1ada5254c 100644
--- a/src/libs/libgroff/relocatable.h
+++ b/src/libs/libgroff/relocatable.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
+/* Copyright 2014-2020 Free Software Foundation, Inc.
 
 This file is part of groff.
 
diff --git a/src/libs/libgroff/relocate.cpp b/src/libs/libgroff/relocate.cpp
index af84911a1..fe6ab656c 100644
--- a/src/libs/libgroff/relocate.cpp
+++ b/src/libs/libgroff/relocate.cpp
@@ -1,5 +1,5 @@
 /* Provide relocation for macro and font files.
-   Copyright (C) 2005-2024 Free Software Foundation, Inc.
+   Copyright 2005-2024 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify it
    under the terms of the GNU Library General Public License as published
diff --git a/src/libs/libgroff/searchpath.cpp b/src/libs/libgroff/searchpath.cpp
index 0e41c7268..7b35a9330 100644
--- a/src/libs/libgroff/searchpath.cpp
+++ b/src/libs/libgroff/searchpath.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2024 Free Software Foundation, Inc.
+/* Copyright 1989-2024 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/spawnvp.c b/src/libs/libgroff/spawnvp.c
index 9851a40e4..ec4e56dc5 100644
--- a/src/libs/libgroff/spawnvp.c
+++ b/src/libs/libgroff/spawnvp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004-2020 Free Software Foundation, Inc.
+/* Copyright 2004-2020 Free Software Foundation, Inc.
      Written by: Keith Marshall ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/string.cpp b/src/libs/libgroff/string.cpp
index db1103cf3..816f67442 100644
--- a/src/libs/libgroff/string.cpp
+++ b/src/libs/libgroff/string.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/strsave.cpp b/src/libs/libgroff/strsave.cpp
index 95a529b41..0b1f53215 100644
--- a/src/libs/libgroff/strsave.cpp
+++ b/src/libs/libgroff/strsave.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/strtol.c b/src/libs/libgroff/strtol.c
index e2cea0795..b1c2bc7e6 100644
--- a/src/libs/libgroff/strtol.c
+++ b/src/libs/libgroff/strtol.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
+/* Copyright 1989-2020 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/symbol.cpp b/src/libs/libgroff/symbol.cpp
index a0082bf7c..ace179aaf 100644
--- a/src/libs/libgroff/symbol.cpp
+++ b/src/libs/libgroff/symbol.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/tmpfile.cpp b/src/libs/libgroff/tmpfile.cpp
index eb1034821..6e8b243c9 100644
--- a/src/libs/libgroff/tmpfile.cpp
+++ b/src/libs/libgroff/tmpfile.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989-2025 Free Software Foundation, Inc.
+/* Copyright 1989-2025 Free Software Foundation, Inc.
      Written by James Clark ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/tmpname.cpp b/src/libs/libgroff/tmpname.cpp
index 53c1d2754..ccdeec909 100644
--- a/src/libs/libgroff/tmpname.cpp
+++ b/src/libs/libgroff/tmpname.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001-2020 Free Software Foundation, Inc.
+/* Copyright 2001-2020 Free Software Foundation, Inc.
      Written by Werner Lemberg ([email protected])
 
 This file is part of groff.
diff --git a/src/libs/libgroff/unicode.cpp b/src/libs/libgroff/unicode.cpp
index d0e779ed1..a0711c02e 100644
--- a/src/libs/libgroff/unicode.cpp
+++ b/src/libs/libgroff/unicode.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
+/* Copyright 2002-2024 Free Software Foundation, Inc.
      Written by Werner Lemberg <[email protected]>
 
 This file is part of groff.
diff --git a/src/libs/libgroff/uniglyph.cpp b/src/libs/libgroff/uniglyph.cpp
index c6b54ed24..8be309df9 100644
--- a/src/libs/libgroff/uniglyph.cpp
+++ b/src/libs/libgroff/uniglyph.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
+/* Copyright 2002-2024 Free Software Foundation, Inc.
      Written by Werner Lemberg <[email protected]>
 
 This file is part of groff.
diff --git a/src/libs/libgroff/uniuni.cpp b/src/libs/libgroff/uniuni.cpp
index dd0d3d62c..bdd81d9e3 100644
--- a/src/libs/libgroff/uniuni.cpp
+++ b/src/libs/libgroff/uniuni.cpp
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002-2024  Free Software Foundation, Inc.
+/* Copyright 2002-2024  Free Software Foundation, Inc.
      Written by Werner Lemberg <[email protected]>
 
 This file is part of groff.

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