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[groff] 01/01: chem: change license into GPL2


From: Bernd Warken
Subject: [groff] 01/01: chem: change license into GPL2
Date: Thu, 27 Feb 2014 11:39:26 +0000

bwarken pushed a commit to branch master
in repository groff.

commit b66b9d00c0fc73f85751959a3102712abdee0bf8
Author: Bernd Warken <address@hidden>
Date:   Thu Feb 27 12:39:12 2014 +0100

    chem: change license into GPL2
---
 contrib/chem/ChangeLog                             |    4 ++
 contrib/chem/Makefile.sub                          |   14 ++++----
 contrib/chem/README.txt                            |   13 ++++----
 contrib/chem/chem.man                              |   30 ++++++-------------
 contrib/chem/chem.pic                              |   13 ++++----
 contrib/chem/chem.pl                               |    9 ++---
 contrib/chem/examples/122/README.txt               |   12 ++++---
 contrib/chem/examples/122/ch2a_ethyl.chem          |   12 ++++---
 contrib/chem/examples/122/ch2b_benzene.chem        |   12 ++++---
 contrib/chem/examples/122/ch2c_benzene_right.chem  |   14 ++++----
 contrib/chem/examples/122/ch4a_stick.chem          |   12 ++++---
 contrib/chem/examples/122/ch4b_methyl_acetate.chem |   12 ++++---
 contrib/chem/examples/122/ch4c_colon.chem          |   12 ++++---
 contrib/chem/examples/122/ch4d_HCl.H2O.chem        |   12 ++++---
 contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem     |   12 ++++---
 contrib/chem/examples/122/ch4f_C.chem              |   12 ++++---
 contrib/chem/examples/122/ch4g_BP.chem             |   12 ++++---
 contrib/chem/examples/122/ch4h_methacrylate.chem   |   12 ++++---
 contrib/chem/examples/122/ch4i_cyclo.chem          |   12 ++++---
 contrib/chem/examples/122/ch4j_ring4.chem          |   12 ++++---
 contrib/chem/examples/122/ch4k_ring3.chem          |   12 ++++---
 contrib/chem/examples/122/ch4l_vertex.chem         |   12 ++++---
 contrib/chem/examples/122/ch4m_double.chem         |   12 ++++---
 contrib/chem/examples/122/ch4n_triple.chem         |   12 ++++---
 contrib/chem/examples/122/ch4o_aromatic.chem       |   14 ++++----
 contrib/chem/examples/122/ch4p_cholestanol.chem    |   12 ++++---
 contrib/chem/examples/122/ch4q_rings.chem          |   12 ++++---
 contrib/chem/examples/122/ch4r_spiro.chem          |   12 ++++---
 contrib/chem/examples/122/ch4s_heteroatoms.chem    |   12 ++++---
 contrib/chem/examples/122/ch4t_polycyclic.chem     |   12 ++++---
 contrib/chem/examples/122/ch4u_nicotine.chem       |   12 ++++---
 contrib/chem/examples/122/ch4v_histidine.chem      |   12 ++++---
 contrib/chem/examples/122/ch4w_lsd.chem            |   12 ++++---
 contrib/chem/examples/122/ch4x_anisole.chem        |   12 ++++---
 contrib/chem/examples/122/ch4y_reserpine.chem      |   12 ++++---
 contrib/chem/examples/122/ch4z1_eqn_glutamic.chem  |   12 ++++---
 contrib/chem/examples/122/ch4z2_text.chem          |   12 ++++---
 contrib/chem/examples/122/ch5a_size.chem           |   12 ++++---
 contrib/chem/examples/122/ch6a_pic.chem            |   12 ++++---
 contrib/chem/examples/122/ch6b_dna.chem            |   12 ++++---
 contrib/chem/examples/122/chAa_polymer.chem        |   12 ++++---
 contrib/chem/examples/122/chAb_vinyl_chloro.chem   |   12 ++++---
 contrib/chem/examples/122/chAc_morphine.chem       |   12 ++++---
 contrib/chem/examples/122/chAd_chlorophyll.chem    |   12 ++++---
 contrib/chem/examples/122/chAe_chair.chem          |   12 ++++---
 contrib/chem/examples/122/chAf_arrow.chem          |   12 ++++---
 contrib/chem/examples/122/chAg_circle.chem         |   12 ++++---
 contrib/chem/examples/122/chAh_brackets.chem       |   12 ++++---
 .../examples/122/chAi_poly_vinyl_chloride.chem     |   12 ++++---
 contrib/chem/examples/122/chBa_jump.chem           |   12 ++++---
 contrib/chem/examples/122/chBb_bonds.chem          |   12 ++++---
 contrib/chem/examples/122/chBc_rings.chem          |   12 ++++---
 contrib/chem/examples/README.txt                   |    9 +++--
 contrib/chem/examples/atp.chem                     |   13 ++++----
 contrib/chem/examples/cholesterin.chem             |    9 ++---
 contrib/chem/examples/ethamivan.chem               |   13 ++++----
 contrib/chem/examples/lsd.chem                     |    9 ++---
 contrib/chem/examples/morphine.chem                |   12 ++++---
 contrib/chem/examples/penicillin.chem              |   12 ++++---
 contrib/chem/examples/reserpine.chem               |   12 ++++---
 60 files changed, 406 insertions(+), 322 deletions(-)

diff --git a/contrib/chem/ChangeLog b/contrib/chem/ChangeLog
index a631d27..b9e978f 100644
--- a/contrib/chem/ChangeLog
+++ b/contrib/chem/ChangeLog
@@ -1,3 +1,7 @@
+2013-01-29  Bernd Warken  <address@hidden>
+
+       * all: Change license into GPL2.
+
 2013-01-29  Werner LEMBERG  <address@hidden>
 
        * Makefile.sub (MOSTLYCLEANADD): Fix typo.
diff --git a/contrib/chem/Makefile.sub b/contrib/chem/Makefile.sub
index 95caed3..93f3e19 100644
--- a/contrib/chem/Makefile.sub
+++ b/contrib/chem/Makefile.sub
@@ -2,25 +2,25 @@
 
 # File position: <groff-source>/contrib/chem/Makefile.sub
 
-# Copyright (C) 2006, 2009, 2010, 2013 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2010, 2013-14
+#   Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 29 Jan 2013
+# Last update: 27 Feb 2014
 
 # This file is part of `chem' which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
 
 ########################################################################
 
diff --git a/contrib/chem/README.txt b/contrib/chem/README.txt
index 2551845..b04c594 100644
--- a/contrib/chem/README.txt
+++ b/contrib/chem/README.txt
@@ -24,25 +24,24 @@ are written in the `chem' language.  The file names end 
with .chem.
 
 ####### License
 
-Last update: 5 Jan 2009
+Last update: 27 Feb 2014
 
-Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 Written by Bernd Warken <address@hidden>.
 
 This file is part of `chem', which is part of `groff'.
 
 `groff' is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+under the terms of the GNU General Public License (GPL) vbersion 2 as
+published by the Free Software Foundation.
 
 `groff' is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
+The GPL2 license text is available in the internet at
+<http://www.gnu.org/licenses/gpl-2.0.html>.
 
 
 ####### Emacs settings
diff --git a/contrib/chem/chem.man b/contrib/chem/chem.man
index b2bf754..75713bc 100644
--- a/contrib/chem/chem.man
+++ b/contrib/chem/chem.man
@@ -4,7 +4,7 @@
 Source file position:  <groff_source_top>/contrib/chem/chem.man
 Installed position:    $prefix/share/man/man1/@address@hidden
 
-Last update: 05 Jan 2009
+Last update: 27 Feb 2014
 ..
 .
 .
@@ -22,7 +22,7 @@ version of
 .
 .
 .de co
-Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+Copyright (C) 2006, 2007, 2008, 2009, 2014 Free Software Foundation, Inc.
 .
 .
 .P
@@ -35,31 +35,21 @@ a free software project.
 You can redistribute it and/or modify it under the terms of the
 .nh
 .B "GNU General Public License"
+.RB ( GPL )
+.B version 2
 .hy
 as published by the
 .nh
-.BR "Free Software Foundation" ,
+.BR "Free Software Foundation" .
 .hy
-either version\~2, or (at your option) any later version.
 .
 .
 .P
-You should have received a copy of the \f(CRGNU General Public
-License\fP along with
-.IR groff ,
-see the files \%\f(CBCOPYING\fP and \%\f(CBLICENSE\fP in the top
-directory of the
-.I groff
-source package.
-.
-Or read the
-.I man page
-.BR gpl (1).
-You can also write to the
-.nh
-.B "Free Software Foundation, 51 Franklin St - Fifth Floor, Boston,"
-.BR "MA 02110-1301, USA" .
-.hy
+The license text for
+.B GPL2
+is available in the internet at
+.UR http://www.gnu.org/licenses/gpl-2.0.html
+.UE .
 ..
 .
 .
diff --git a/contrib/chem/chem.pic b/contrib/chem/chem.pic
index d34c732..2eddac4 100644
--- a/contrib/chem/chem.pic
+++ b/contrib/chem/chem.pic
@@ -3,24 +3,25 @@
 # Source file position: <groff-source>/contrib/chem/chem.pic
 # Installed position: <prefix>/share/groff/<version>/pic
 
-# Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2008, 2009, 2014 Free Software Foundation, Inc.
 # Written by Brian Kernighan <http://cm.bell-labs.com/cm/cs/who/bwk>,
 # modified by Bernd Warken <address@hidden>.
 
+# Last update: 27 Feb 2014
+
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# The license text for GPL2 is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
 
 ########################################################################
 
diff --git a/contrib/chem/chem.pl b/contrib/chem/chem.pl
index dacf8b4..84e9f5e 100755
--- a/contrib/chem/chem.pl
+++ b/contrib/chem/chem.pl
@@ -11,17 +11,16 @@
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
 
 ########################################################################
 # settings
diff --git a/contrib/chem/examples/122/README.txt 
b/contrib/chem/examples/122/README.txt
index e6ecde8..e0049c2 100644
--- a/contrib/chem/examples/122/README.txt
+++ b/contrib/chem/examples/122/README.txt
@@ -46,17 +46,16 @@ To get a suitable `groff' output run
 
 ####### License
 
-Last update: 5 Jan 2009
+Last update: 14 Feb 2014
 
-Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 Written by Bernd Warken <address@hidden>.
 
 This file is part of `chem', which is part of `groff'.
 
 `groff' is free software; you can redistribute it and/or modify it
-under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+under the terms of the GNU General Public License (GPL) version 2 as
+published by the Free Software Foundation.
 
 `groff' is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
@@ -66,6 +65,9 @@ for more details.
 You should have received a copy of the GNU General Public License
 along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+The GPL2 license text is available in the internet at
+<http://www.gnu.org/licenses/gpl-2.0.html>.
+
 
 ####### Emacs settings
 
diff --git a/contrib/chem/examples/122/ch2a_ethyl.chem 
b/contrib/chem/examples/122/ch2a_ethyl.chem
index 0f1ca61..9aed4ee 100644
--- a/contrib/chem/examples/122/ch2a_ethyl.chem
+++ b/contrib/chem/examples/122/ch2a_ethyl.chem
@@ -9,16 +9,15 @@ ch2a_ethyl.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Jan 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch2a_ethyl.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        CH3
diff --git a/contrib/chem/examples/122/ch2b_benzene.chem 
b/contrib/chem/examples/122/ch2b_benzene.chem
index d9e492d..9c5cd44 100644
--- a/contrib/chem/examples/122/ch2b_benzene.chem
+++ b/contrib/chem/examples/122/ch2b_benzene.chem
@@ -9,16 +9,15 @@ ch2b_benzene.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 14 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch2b_benzene.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        benzene
diff --git a/contrib/chem/examples/122/ch2c_benzene_right.chem 
b/contrib/chem/examples/122/ch2c_benzene_right.chem
index ab4c956..3b1b41d 100644
--- a/contrib/chem/examples/122/ch2c_benzene_right.chem
+++ b/contrib/chem/examples/122/ch2c_benzene_right.chem
@@ -9,16 +9,13 @@ ch2c_benzene_right.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
-
-# This file is part of `chem', which is part of `groff'.
+# Last update: 27 Feb 2014
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +25,9 @@ ch2c_benzene_right.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        benzene pointing right       # a rotated benzene ring
diff --git a/contrib/chem/examples/122/ch4a_stick.chem 
b/contrib/chem/examples/122/ch4a_stick.chem
index f561f2a..bbe748d 100644
--- a/contrib/chem/examples/122/ch4a_stick.chem
+++ b/contrib/chem/examples/122/ch4a_stick.chem
@@ -9,16 +9,15 @@ ch4a_stick.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4a_stick.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        bond right
diff --git a/contrib/chem/examples/122/ch4b_methyl_acetate.chem 
b/contrib/chem/examples/122/ch4b_methyl_acetate.chem
index a519289..c35b512 100644
--- a/contrib/chem/examples/122/ch4b_methyl_acetate.chem
+++ b/contrib/chem/examples/122/ch4b_methyl_acetate.chem
@@ -9,16 +9,15 @@ ch4b_methyl_acetate.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4b_methyl_acetate.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 CH3      # the 3 is automatically turned into a subscript
diff --git a/contrib/chem/examples/122/ch4c_colon.chem 
b/contrib/chem/examples/122/ch4c_colon.chem
index 19d156f..6ec053f 100644
--- a/contrib/chem/examples/122/ch4c_colon.chem
+++ b/contrib/chem/examples/122/ch4c_colon.chem
@@ -9,16 +9,15 @@ ch4c_colon.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4c_colon.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        CH3
diff --git a/contrib/chem/examples/122/ch4d_HCl.H2O.chem 
b/contrib/chem/examples/122/ch4d_HCl.H2O.chem
index 9f57edc..96d70b4 100644
--- a/contrib/chem/examples/122/ch4d_HCl.H2O.chem
+++ b/contrib/chem/examples/122/ch4d_HCl.H2O.chem
@@ -9,16 +9,15 @@ ch4d_HCl.H2O.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4d_HCl.H2O.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        HCl.H2O
diff --git a/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem 
b/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
index 06d308b..4ae4434 100644
--- a/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
+++ b/contrib/chem/examples/122/ch4e_CaSO4.2H2O.chem
@@ -9,16 +9,15 @@ ch4e_CaSO4.2H2O.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4e_CaSO4.2H2O.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        CaSO4.2H2O
diff --git a/contrib/chem/examples/122/ch4f_C.chem 
b/contrib/chem/examples/122/ch4f_C.chem
index 496db1c..cc3b35d 100644
--- a/contrib/chem/examples/122/ch4f_C.chem
+++ b/contrib/chem/examples/122/ch4f_C.chem
@@ -9,16 +9,15 @@ ch4f_C.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4f_C.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        bond ; C             # 1st definition of C
diff --git a/contrib/chem/examples/122/ch4g_BP.chem 
b/contrib/chem/examples/122/ch4g_BP.chem
index 1f7783c..ffc4441 100644
--- a/contrib/chem/examples/122/ch4g_BP.chem
+++ b/contrib/chem/examples/122/ch4g_BP.chem
@@ -9,16 +9,15 @@ ch4g_BP.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4g_BP.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 # this is the isopropyl group
diff --git a/contrib/chem/examples/122/ch4h_methacrylate.chem 
b/contrib/chem/examples/122/ch4h_methacrylate.chem
index ba8e9c1..79407f5 100644
--- a/contrib/chem/examples/122/ch4h_methacrylate.chem
+++ b/contrib/chem/examples/122/ch4h_methacrylate.chem
@@ -9,16 +9,15 @@ ch4h_methacrylate.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4h_methacrylate.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     bond dotted
diff --git a/contrib/chem/examples/122/ch4i_cyclo.chem 
b/contrib/chem/examples/122/ch4i_cyclo.chem
index 70416c2..5a43860 100644
--- a/contrib/chem/examples/122/ch4i_cyclo.chem
+++ b/contrib/chem/examples/122/ch4i_cyclo.chem
@@ -9,16 +9,15 @@ ch4i_cyclo.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4i_cyclo.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R3:    ring3
diff --git a/contrib/chem/examples/122/ch4j_ring4.chem 
b/contrib/chem/examples/122/ch4j_ring4.chem
index 9769873..212f46c 100644
--- a/contrib/chem/examples/122/ch4j_ring4.chem
+++ b/contrib/chem/examples/122/ch4j_ring4.chem
@@ -9,16 +9,15 @@ ch4j_ring4.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4j_ring4.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        ring4 pointing 45
diff --git a/contrib/chem/examples/122/ch4k_ring3.chem 
b/contrib/chem/examples/122/ch4k_ring3.chem
index 7929844..abadec1 100644
--- a/contrib/chem/examples/122/ch4k_ring3.chem
+++ b/contrib/chem/examples/122/ch4k_ring3.chem
@@ -9,16 +9,15 @@ ch4k_ring3.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4k_ring3.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R: ring3
diff --git a/contrib/chem/examples/122/ch4l_vertex.chem 
b/contrib/chem/examples/122/ch4l_vertex.chem
index 75d2930..461ec75 100644
--- a/contrib/chem/examples/122/ch4l_vertex.chem
+++ b/contrib/chem/examples/122/ch4l_vertex.chem
@@ -9,16 +9,15 @@ ch4l_vertex.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4l_vertex.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R: benzene pointing right
diff --git a/contrib/chem/examples/122/ch4m_double.chem 
b/contrib/chem/examples/122/ch4m_double.chem
index 0efdfc4..37bff36 100644
--- a/contrib/chem/examples/122/ch4m_double.chem
+++ b/contrib/chem/examples/122/ch4m_double.chem
@@ -9,16 +9,15 @@ ch4m_double.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4m_double.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        ring double 1,2 3,4 5,6
diff --git a/contrib/chem/examples/122/ch4n_triple.chem 
b/contrib/chem/examples/122/ch4n_triple.chem
index d8bdb1b..61962d1 100644
--- a/contrib/chem/examples/122/ch4n_triple.chem
+++ b/contrib/chem/examples/122/ch4n_triple.chem
@@ -9,16 +9,15 @@ ch4n_triple.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4n_triple.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        ring8 triple 3,4
diff --git a/contrib/chem/examples/122/ch4o_aromatic.chem 
b/contrib/chem/examples/122/ch4o_aromatic.chem
index 797ab38..d88658e 100644
--- a/contrib/chem/examples/122/ch4o_aromatic.chem
+++ b/contrib/chem/examples/122/ch4o_aromatic.chem
@@ -9,16 +9,13 @@ ch4o_aromatic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
-
-# This file is part of `chem', which is part of `groff'.
+# Last update: 27 Feb 2014
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +25,9 @@ ch4o_aromatic.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R: aromatic ring7
diff --git a/contrib/chem/examples/122/ch4p_cholestanol.chem 
b/contrib/chem/examples/122/ch4p_cholestanol.chem
index 3e02b9e..0788b61 100644
--- a/contrib/chem/examples/122/ch4p_cholestanol.chem
+++ b/contrib/chem/examples/122/ch4p_cholestanol.chem
@@ -9,16 +9,15 @@ ch4p_cholestanol.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4p_cholestanol.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: ring6
diff --git a/contrib/chem/examples/122/ch4q_rings.chem 
b/contrib/chem/examples/122/ch4q_rings.chem
index 21abd84..5cd919e 100644
--- a/contrib/chem/examples/122/ch4q_rings.chem
+++ b/contrib/chem/examples/122/ch4q_rings.chem
@@ -9,16 +9,15 @@ ch4q_rings.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4q_rings.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R3: ring3
diff --git a/contrib/chem/examples/122/ch4r_spiro.chem 
b/contrib/chem/examples/122/ch4r_spiro.chem
index 3440c38..b7eed9c 100644
--- a/contrib/chem/examples/122/ch4r_spiro.chem
+++ b/contrib/chem/examples/122/ch4r_spiro.chem
@@ -9,16 +9,15 @@ ch4r_spiro.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4r_spiro.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: ring6
diff --git a/contrib/chem/examples/122/ch4s_heteroatoms.chem 
b/contrib/chem/examples/122/ch4s_heteroatoms.chem
index 8d94492..714a5b3 100644
--- a/contrib/chem/examples/122/ch4s_heteroatoms.chem
+++ b/contrib/chem/examples/122/ch4s_heteroatoms.chem
@@ -9,16 +9,15 @@ ch4s_heteroatoms.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4s_heteroatoms.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        ring put N at 2 put S at 4 double 2,3 4,5 6,1
diff --git a/contrib/chem/examples/122/ch4t_polycyclic.chem 
b/contrib/chem/examples/122/ch4t_polycyclic.chem
index 5044dc4..a429320 100644
--- a/contrib/chem/examples/122/ch4t_polycyclic.chem
+++ b/contrib/chem/examples/122/ch4t_polycyclic.chem
@@ -9,16 +9,15 @@ ch4t_polycyclic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4t_polycyclic.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: benzene pointing right
diff --git a/contrib/chem/examples/122/ch4u_nicotine.chem 
b/contrib/chem/examples/122/ch4u_nicotine.chem
index 5f0e024..7251408 100644
--- a/contrib/chem/examples/122/ch4u_nicotine.chem
+++ b/contrib/chem/examples/122/ch4u_nicotine.chem
@@ -9,16 +9,15 @@ ch4u_nicotine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4u_nicotine.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
        benzene put N at 4
diff --git a/contrib/chem/examples/122/ch4v_histidine.chem 
b/contrib/chem/examples/122/ch4v_histidine.chem
index 819da05..beed74f 100644
--- a/contrib/chem/examples/122/ch4v_histidine.chem
+++ b/contrib/chem/examples/122/ch4v_histidine.chem
@@ -9,16 +9,15 @@ ch4v_histidine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4v_histidine.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: flatring pointing down put N at 2 put N at 5 double 1,2 3,4
diff --git a/contrib/chem/examples/122/ch4w_lsd.chem 
b/contrib/chem/examples/122/ch4w_lsd.chem
index 5325687..139a821 100644
--- a/contrib/chem/examples/122/ch4w_lsd.chem
+++ b/contrib/chem/examples/122/ch4w_lsd.chem
@@ -9,16 +9,15 @@ ch4w_lsd.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4w_lsd.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 B: benzene pointing right
diff --git a/contrib/chem/examples/122/ch4x_anisole.chem 
b/contrib/chem/examples/122/ch4x_anisole.chem
index 48727c5..3fb19cc 100644
--- a/contrib/chem/examples/122/ch4x_anisole.chem
+++ b/contrib/chem/examples/122/ch4x_anisole.chem
@@ -9,16 +9,15 @@ ch4x_anisole.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4x_anisole.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: benzene
diff --git a/contrib/chem/examples/122/ch4y_reserpine.chem 
b/contrib/chem/examples/122/ch4y_reserpine.chem
index e822395..7803e41 100644
--- a/contrib/chem/examples/122/ch4y_reserpine.chem
+++ b/contrib/chem/examples/122/ch4y_reserpine.chem
@@ -10,16 +10,15 @@ ch4y_reserpine.chem:
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 # Some corrections were added.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -29,6 +28,9 @@ ch4y_reserpine.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     CH3O
diff --git a/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem 
b/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
index 0ad7bb1..51866ee 100644
--- a/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
+++ b/contrib/chem/examples/122/ch4z1_eqn_glutamic.chem
@@ -13,16 +13,15 @@ delim $$
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 # Some corrections were added.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -32,6 +31,9 @@ delim $$
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 # a left bracket
diff --git a/contrib/chem/examples/122/ch4z2_text.chem 
b/contrib/chem/examples/122/ch4z2_text.chem
index 47064ef..14a0ce2 100644
--- a/contrib/chem/examples/122/ch4z2_text.chem
+++ b/contrib/chem/examples/122/ch4z2_text.chem
@@ -9,16 +9,15 @@ ch4z2_text.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch4z2_text.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     bond 120 dotted
diff --git a/contrib/chem/examples/122/ch5a_size.chem 
b/contrib/chem/examples/122/ch5a_size.chem
index d945db3..a98e8da 100644
--- a/contrib/chem/examples/122/ch5a_size.chem
+++ b/contrib/chem/examples/122/ch5a_size.chem
@@ -9,16 +9,15 @@ ch5a_size.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch5a_size.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 .ps 14
diff --git a/contrib/chem/examples/122/ch6a_pic.chem 
b/contrib/chem/examples/122/ch6a_pic.chem
index f444591..9bd7f0e 100644
--- a/contrib/chem/examples/122/ch6a_pic.chem
+++ b/contrib/chem/examples/122/ch6a_pic.chem
@@ -9,16 +9,15 @@ ch6a_pic.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch6a_pic.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R:     ring double 2,3
diff --git a/contrib/chem/examples/122/ch6b_dna.chem 
b/contrib/chem/examples/122/ch6b_dna.chem
index 38577db..8448147 100644
--- a/contrib/chem/examples/122/ch6b_dna.chem
+++ b/contrib/chem/examples/122/ch6b_dna.chem
@@ -9,16 +9,15 @@ ch6b_dna.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ ch6b_dna.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 P: [
diff --git a/contrib/chem/examples/122/chAa_polymer.chem 
b/contrib/chem/examples/122/chAa_polymer.chem
index 5dc8838..c70509b 100644
--- a/contrib/chem/examples/122/chAa_polymer.chem
+++ b/contrib/chem/examples/122/chAa_polymer.chem
@@ -9,16 +9,15 @@ chAa_polymer.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAa_polymer.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 # epoxy based on the m-phenyldiamine cured bisphenol-A
diff --git a/contrib/chem/examples/122/chAb_vinyl_chloro.chem 
b/contrib/chem/examples/122/chAb_vinyl_chloro.chem
index 5f9d197..190342b 100644
--- a/contrib/chem/examples/122/chAb_vinyl_chloro.chem
+++ b/contrib/chem/examples/122/chAb_vinyl_chloro.chem
@@ -9,16 +9,15 @@ chAb_vinyl_chloro.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAb_vinyl_chloro.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     Cl
diff --git a/contrib/chem/examples/122/chAc_morphine.chem 
b/contrib/chem/examples/122/chAc_morphine.chem
index bd37cde..d5402e5 100644
--- a/contrib/chem/examples/122/chAc_morphine.chem
+++ b/contrib/chem/examples/122/chAc_morphine.chem
@@ -9,16 +9,15 @@ chAc_morphine.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAc_morphine.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1:  ring6 double 1,2
diff --git a/contrib/chem/examples/122/chAd_chlorophyll.chem 
b/contrib/chem/examples/122/chAd_chlorophyll.chem
index 99495e3..d120d94 100644
--- a/contrib/chem/examples/122/chAd_chlorophyll.chem
+++ b/contrib/chem/examples/122/chAd_chlorophyll.chem
@@ -9,16 +9,15 @@ chAd_chlorophyll.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAd_chlorophyll.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     Mg
diff --git a/contrib/chem/examples/122/chAe_chair.chem 
b/contrib/chem/examples/122/chAe_chair.chem
index 23de772..722b734 100644
--- a/contrib/chem/examples/122/chAe_chair.chem
+++ b/contrib/chem/examples/122/chAe_chair.chem
@@ -9,16 +9,15 @@ chAe_chair.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAe_chair.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 pic define chair { [
diff --git a/contrib/chem/examples/122/chAf_arrow.chem 
b/contrib/chem/examples/122/chAf_arrow.chem
index e7566b5..02f0dc6 100644
--- a/contrib/chem/examples/122/chAf_arrow.chem
+++ b/contrib/chem/examples/122/chAf_arrow.chem
@@ -12,16 +12,15 @@ delim $$
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -31,6 +30,9 @@ delim $$
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
     bond length .1 ; BP
diff --git a/contrib/chem/examples/122/chAg_circle.chem 
b/contrib/chem/examples/122/chAg_circle.chem
index b51c9d9..5a2a902 100644
--- a/contrib/chem/examples/122/chAg_circle.chem
+++ b/contrib/chem/examples/122/chAg_circle.chem
@@ -9,16 +9,15 @@ chAg_circle.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chAg_circle.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 bond 120 ; C
diff --git a/contrib/chem/examples/122/chAh_brackets.chem 
b/contrib/chem/examples/122/chAh_brackets.chem
index c45df5d..65c195c 100644
--- a/contrib/chem/examples/122/chAh_brackets.chem
+++ b/contrib/chem/examples/122/chAh_brackets.chem
@@ -12,16 +12,15 @@ delim $$
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -31,6 +30,9 @@ delim $$
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 [
diff --git a/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem 
b/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
index ea0be89..790710d 100644
--- a/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
+++ b/contrib/chem/examples/122/chAi_poly_vinyl_chloride.chem
@@ -10,16 +10,15 @@ chAi_poly_vinyl_chloride.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -29,6 +28,9 @@ chAi_poly_vinyl_chloride.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 db = .12
diff --git a/contrib/chem/examples/122/chBa_jump.chem 
b/contrib/chem/examples/122/chBa_jump.chem
index 9e60a28..9820182 100644
--- a/contrib/chem/examples/122/chBa_jump.chem
+++ b/contrib/chem/examples/122/chBa_jump.chem
@@ -9,16 +9,15 @@ chBa_jump.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chBa_jump.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 SiO2          # name = SiO2
diff --git a/contrib/chem/examples/122/chBb_bonds.chem 
b/contrib/chem/examples/122/chBb_bonds.chem
index 22fdf95..032256a 100644
--- a/contrib/chem/examples/122/chBb_bonds.chem
+++ b/contrib/chem/examples/122/chBb_bonds.chem
@@ -9,16 +9,15 @@ chBb_bonds.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chBb_bonds.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 C
diff --git a/contrib/chem/examples/122/chBc_rings.chem 
b/contrib/chem/examples/122/chBc_rings.chem
index a6fff43..96d24e2 100644
--- a/contrib/chem/examples/122/chBc_rings.chem
+++ b/contrib/chem/examples/122/chBc_rings.chem
@@ -9,16 +9,15 @@ chBc_rings.chem:
 #   by Jon L. Bentley, Lynn W. Jelinski, Brian W. Kernighan
 #   <http://cm.bell-labs.com/cm/cs/cstr/122.ps.gz>.
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ chBc_rings.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 ########################################################################
 
 R1: benzene
diff --git a/contrib/chem/examples/README.txt b/contrib/chem/examples/README.txt
index da891b8..f12c328 100644
--- a/contrib/chem/examples/README.txt
+++ b/contrib/chem/examples/README.txt
@@ -37,9 +37,9 @@ chemically.
 
 ####### License
 
-Last update: 5 Jan 2009
+Last update: 27 Feb 2014
 
-Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 Written by Bernd Warken <address@hidden>.
 
 This file is part of `chem', which is part of `groff'.
@@ -54,8 +54,9 @@ ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
-You should have received a copy of the GNU General Public License
-along with this program. If not, see <http://www.gnu.org/licenses/>.
+The GPL2 license text is available in the internet at
+<http://www.gnu.org/licenses/gpl-2.0.html>.
+
 
 
 ####### Emacs settings
diff --git a/contrib/chem/examples/atp.chem b/contrib/chem/examples/atp.chem
index 076f961..f122d8f 100644
--- a/contrib/chem/examples/atp.chem
+++ b/contrib/chem/examples/atp.chem
@@ -11,25 +11,24 @@ atp.chem:
 # Source file position: <groff-source>/contrib/chem/example/atp.chem
 # Installed position: <prefix>/share/doc/groff/example/chem/atp.chem
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
 
 R1:    ring5 pointing left double 1,2 3,4 put N at 2 put N at 5
 B:     benzene put N at 2 with .V6 at R1.V3 with .V5 at R1.V4
diff --git a/contrib/chem/examples/cholesterin.chem 
b/contrib/chem/examples/cholesterin.chem
index d8684a1..8df5a44 100644
--- a/contrib/chem/examples/cholesterin.chem
+++ b/contrib/chem/examples/cholesterin.chem
@@ -9,17 +9,16 @@ cholesterin.chem:
 # Source file position: <groff-source>/contrib/chem/example/cholesterin.p
 # Installed position: <prefix>/share/doc/groff/example/chem/cholesterin.p
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/contrib/chem/examples/ethamivan.chem 
b/contrib/chem/examples/ethamivan.chem
index 19c720c..91b82f7 100644
--- a/contrib/chem/examples/ethamivan.chem
+++ b/contrib/chem/examples/ethamivan.chem
@@ -8,25 +8,24 @@ ethamivan.chem:
 # Source file position: <groff-source>/contrib/chem/example/ethamivan.chem
 # Installed position: <prefix>/share/doc/groff/example/chem/ethamivan.chem
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 27 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 # General Public License for more details.
 
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <http://www.gnu.org/licenses/>.
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
 
 R:     ring pointing left double 2,3 4,5 6,1
        bond left from R.V1 ; O
diff --git a/contrib/chem/examples/lsd.chem b/contrib/chem/examples/lsd.chem
index f0b7407..4f735be 100644
--- a/contrib/chem/examples/lsd.chem
+++ b/contrib/chem/examples/lsd.chem
@@ -8,17 +8,16 @@ lsd.chem:
 # Source file position: <groff-source>/contrib/chem/example/lsd.p
 # Installed position: <prefix>/share/doc/groff/example/chem/lsd.p
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 14 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/contrib/chem/examples/morphine.chem 
b/contrib/chem/examples/morphine.chem
index eefc68a..69057c7 100644
--- a/contrib/chem/examples/morphine.chem
+++ b/contrib/chem/examples/morphine.chem
@@ -10,17 +10,16 @@ morphine.chem:
 # Source file position: <groff-source>/contrib/chem/example/morphine.chem
 # Installed position: <prefix>/share/doc/groff/example/chem/morphine.chem
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 5 Jan 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -30,6 +29,9 @@ morphine.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 R1:    benzene
 R2:    benzene with .V6 at R1.V2 with .V5 at R1.V3 put N at 4
 R3:    benzene with .V6 at R2.V2 with .V5 at R2.V3
diff --git a/contrib/chem/examples/penicillin.chem 
b/contrib/chem/examples/penicillin.chem
index 99ac21d..a063312 100644
--- a/contrib/chem/examples/penicillin.chem
+++ b/contrib/chem/examples/penicillin.chem
@@ -11,17 +11,16 @@ penicillin.chem:
 # Source file position: <groff-source>/contrib/chem/example/morphine.chem
 # Installed position: <prefix>/share/doc/groff/example/chem/morphine.chem
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 14 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -31,6 +30,9 @@ penicillin.chem:
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 R1:    flatring5 pointing up put S at 1 put N at 4
        bond 45 at R1.V2
        bond 135 at R1.V2
diff --git a/contrib/chem/examples/reserpine.chem 
b/contrib/chem/examples/reserpine.chem
index 05cd2c9..ca76774 100644
--- a/contrib/chem/examples/reserpine.chem
+++ b/contrib/chem/examples/reserpine.chem
@@ -8,17 +8,16 @@ begin chem
 # Source file position: <groff-source>/contrib/chem/example/reserpine.chem
 # Installed position: <prefix>/share/doc/groff/example/chem/reserpine.chem
 
-# Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009, 2014 Free Software Foundation, Inc.
 # Written by Bernd Warken <address@hidden>.
 
-# Last update: 5 Jan 2009
+# Last update: 14 Feb 2014
 
 # This file is part of `chem', which is part of `groff'.
 
 # `groff' is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# under the terms of the GNU General Public License (GPL) version 2 as
+# published by the Free Software Foundation.
 
 # `groff' is distributed in the hope that it will be useful, but
 # WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -28,6 +27,9 @@ begin chem
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+# The GPL2 license text is available in the internet at
+# <http://www.gnu.org/licenses/gpl-2.0.html>.
+
 R1:    benzene pointing up
        bond -120 from R1.V5 ; O
        bond left



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