examples: use consistently the GFDL header for readmes

* examples/c++/README.md, examples/c++/calc++/README.md,
* examples/c/calc/README.md, examples/c/lexcalc/README.md,
* examples/c/pushcalc/README.md, examples/c/reccalc/README.md:
Prefer the GFDL banner to the GPL one.

8 files changed, 41 insertions, 78 deletions

diff --git a/README b/README
index 549f10f6..f18958a1 100644
--- a/README
+++ b/README
@@ -85,18 +85,12 @@ Software Foundation, Inc.
 
 This file is part of GNU bison, the GNU Compiler Compiler.
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program 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/>.
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
 
 Local Variables:
 mode: markdown
diff --git a/examples/c++/README.md b/examples/c++/README.md
index e5a11e01..3b8bad03 100644
--- a/examples/c++/README.md
+++ b/examples/c++/README.md
@@ -55,5 +55,5 @@ Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
 Texts.  A copy of the license is included in the "GNU Free
 Documentation License" file as part of this distribution.
 
-# LocalWords:  mfcalc calc parsers yy ispell american
+LocalWords:  mfcalc calc parsers yy ispell american
 --->
diff --git a/examples/c++/calc++/README.md b/examples/c++/calc++/README.md
index a3371a68..1a6a8722 100644
--- a/examples/c++/calc++/README.md
+++ b/examples/c++/calc++/README.md
@@ -38,20 +38,12 @@ End:
 
 Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
-This file is part of Bison, the GNU Compiler Compiler.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program 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/>.
-
-# LocalWords:  calc parsers yy MERCHANTABILITY Ctrl ispell american
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
+
+LocalWords:  calc parsers yy MERCHANTABILITY Ctrl ispell american
 --->
diff --git a/examples/c/README.md b/examples/c/README.md
index 95e2bb2a..e69004c4 100644
--- a/examples/c/README.md
+++ b/examples/c/README.md
@@ -67,6 +67,8 @@ End:
 
 Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
+This file is part of GNU bison, the GNU Compiler Compiler.
+
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3 or
 any later version published by the Free Software Foundation; with no
diff --git a/examples/c/calc/README.md b/examples/c/calc/README.md
index 342f45d8..e994826f 100644
--- a/examples/c/calc/README.md
+++ b/examples/c/calc/README.md
@@ -13,16 +13,11 @@ Copyright (C) 2019-2020 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
 
-This program 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/>.
 --->
diff --git a/examples/c/lexcalc/README.md b/examples/c/lexcalc/README.md
index 58d9d9aa..e0eddedf 100644
--- a/examples/c/lexcalc/README.md
+++ b/examples/c/lexcalc/README.md
@@ -15,16 +15,10 @@ Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program 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/>.
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
 --->
diff --git a/examples/c/pushcalc/README.md b/examples/c/pushcalc/README.md
index 557d7fa6..4cf6ea7c 100644
--- a/examples/c/pushcalc/README.md
+++ b/examples/c/pushcalc/README.md
@@ -22,18 +22,11 @@ End:
 
 Copyright (C) 2020 Free Software Foundation, Inc.
 
-This file is part of Bison, the GNU Compiler Compiler.
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program 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/>.
 --->
diff --git a/examples/c/reccalc/README.md b/examples/c/reccalc/README.md
index e894c227..3bfab9e8 100644
--- a/examples/c/reccalc/README.md
+++ b/examples/c/reccalc/README.md
@@ -28,18 +28,11 @@ End:
 
 Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
-This file is part of Bison, the GNU Compiler Compiler.
+Permission is granted to copy, distribute and/or modify this document
+under the terms of the GNU Free Documentation License, Version 1.3 or
+any later version published by the Free Software Foundation; with no
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
+Texts.  A copy of the license is included in the "GNU Free
+Documentation License" file as part of this distribution.
 
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program 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/>.
 --->