gbranden pushed a commit to branch master
in repository groff.
commit 786724d57deb4b05f486fccc11afbd72c1956de3
Author: G. Branden Robinson <[email protected]>
AuthorDate: Thu Dec 18 17:15:21 2025 -0600
[chem]: 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
---
contrib/chem/README.txt | 3 ++-
contrib/chem/chem.1.man | 2 +-
contrib/chem/chem.am | 3 ++-
contrib/chem/chem.pic | 2 +-
contrib/chem/chem.pl | 2 +-
contrib/chem/examples/README.txt | 3 ++-
6 files changed, 9 insertions(+), 6 deletions(-)
diff --git a/contrib/chem/README.txt b/contrib/chem/README.txt
index 1f0207f6e..625d41a9c 100644
--- a/contrib/chem/README.txt
+++ b/contrib/chem/README.txt
@@ -24,7 +24,8 @@ written in the chem language. The file names end with .chem.
####### License
-Copyright (C) 2006-2020 Free Software Foundation, Inc.
+Copyright 2006-2020 Free Software Foundation, Inc.
+
Written by Bernd Warken <[email protected]>.
This file is part of chem.
diff --git a/contrib/chem/chem.1.man b/contrib/chem/chem.1.man
index c8b23bc73..eb8562813 100644
--- a/contrib/chem/chem.1.man
+++ b/contrib/chem/chem.1.man
@@ -9,7 +9,7 @@ documents
.\" Legal Terms
.\" ====================================================================
.\"
-.\" Copyright (C) 2006-2020 Free Software Foundation, Inc.
+.\" Copyright 2006-2020 Free Software Foundation, Inc.
.\"
.\" This file is part of chem, which is part of groff, a free software
.\" project.
diff --git a/contrib/chem/chem.am b/contrib/chem/chem.am
index 1b36c7db8..3b9fef4d5 100644
--- a/contrib/chem/chem.am
+++ b/contrib/chem/chem.am
@@ -1,4 +1,5 @@
-# Copyright (C) 2006-2024 Free Software Foundation, Inc.
+# Copyright 2006-2024 Free Software Foundation, Inc.
+#
# Written by Bernd Warken <[email protected]>.
# Moved to automake by Bertrand Garrigues
#
diff --git a/contrib/chem/chem.pic b/contrib/chem/chem.pic
index beab7ffb3..2c3525313 100644
--- a/contrib/chem/chem.pic
+++ b/contrib/chem/chem.pic
@@ -1,6 +1,6 @@
# macros for chem
-# Copyright (C) 2006-2020 Free Software Foundation, Inc.
+# Copyright 2006-2020 Free Software Foundation, Inc.
# Written by Brian Kernighan <http://cm.bell-labs.com/cm/cs/who/bwk>,
# modified by Bernd Warken <[email protected]>.
diff --git a/contrib/chem/chem.pl b/contrib/chem/chem.pl
index e0c4923bd..ab190b108 100755
--- a/contrib/chem/chem.pl
+++ b/contrib/chem/chem.pl
@@ -2,7 +2,7 @@
# chem - a groff preprocessor for producing chemical structure diagrams
-my $copyright = 'Copyright (C) 2006-2014, 2022'
+my $copyright = 'Copyright 2006-2014, 2022'
. ' Free Software Foundation, Inc.';
# Written by Bernd Warken <[email protected]>.
diff --git a/contrib/chem/examples/README.txt b/contrib/chem/examples/README.txt
index 731483e7e..9f19e659a 100644
--- a/contrib/chem/examples/README.txt
+++ b/contrib/chem/examples/README.txt
@@ -20,7 +20,8 @@ chemically.
####### License
-Copyright (C) 2006-2020 Free Software Foundation, Inc.
+Copyright 2006-2020 Free Software Foundation, Inc.
+
Written by Bernd Warken <[email protected]>.
This file is part of chem.
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