doc: tidy the text files

* etc/README: Rename/reformat as...
* etc/README.md: this.
And ship it.

NEWS

@@ -4206,23 +4206,6 @@ Output file does not redefine const for C++.
 
 -----
 
-Copyright (C) 1995-2015, 2018-2020 Free Software Foundation, Inc.
-
-This file is part of Bison, the GNU Parser Generator.
-
-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:  yacc YYBACKUP glr GCC lalr ArrayIndexOutOfBoundsException nullptr
 LocalWords:  cplusplus liby rpl fprintf mfcalc Wyacc stmt cond expr mk sym lr
 LocalWords:  IELR ielr Lookahead YYERROR nonassoc LALR's api lookaheads yychar
@@ -4266,3 +4249,14 @@ ispell-dictionary: "american"
 mode: outline
 fill-column: 76
 End:
+
+Copyright (C) 1995-2015, 2018-2020 Free Software Foundation, Inc.
+
+This file is part of Bison, the GNU Parser Generator.
+
+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.

README

@@ -101,6 +101,16 @@ that the range specifies every single year in that closed interval.
 
 <!--
 
+LocalWords:  parsers ngettext Texinfo pdf html YYYY ZZZZ ispell american md
+LocalWords:  MERCHANTABILITY GLR LALR IELR submodule init README src bw
+LocalWords:  Relocatability symlinks symlink
+
+Local Variables:
+mode: markdown
+fill-column: 76
+ispell-dictionary: "american"
+End:
+
 Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2015, 2018-2020 Free
 Software Foundation, Inc.
 
@@ -113,14 +123,4 @@ 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
-fill-column: 76
-ispell-dictionary: "american"
-End:
-
-LocalWords:  parsers ngettext Texinfo pdf html YYYY ZZZZ ispell american md
-LocalWords:  MERCHANTABILITY GLR LALR IELR submodule init README src bw
-LocalWords:  Relocatability symlinks symlink
-
 -->

README-hacking.md

@@ -243,6 +243,9 @@ processes tabs in its input.
 Prefer `res` as the name of the local variable that will be "return"ed by
 the function.
 
+In writing arithmetic comparisons, use "<" and "<=" rather than ">" and ">="
+(http://www.gelato.unsw.edu.au/archives/git/0505/4507.html).
+
 ### Bison
 Follow the GNU Coding Standards.
 

TODO

@@ -617,15 +617,9 @@ Foundation, Inc.
 
 This file is part of Bison, the GNU Compiler Compiler.
 
-This program is free software: you can redistribute it and/or modify
+Permission is granted to copy, distribute and/or modify this document
-it under the terms of the GNU General Public License as published by
+under the terms of the GNU Free Documentation License, Version 1.3 or
-the Free Software Foundation, either version 3 of the License, or
+any later version published by the Free Software Foundation; with no
-(at your option) any later version.
+Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-
+Texts.  A copy of the license is included in the "GNU Free
-This program is distributed in the hope that it will be useful,
+Documentation License" file as part of this distribution.
-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/>.

etc/README

@@ -1,38 +0,0 @@
-* bench.pl
-A primitive Perl script to run benches.  Currently its only bench is
-the usual calculator: it has a lightweight processing part (but not
-null), so it is really emphasizing the cost of the whole parsing
-(including scanning and I/O).
-
-Set the envvars BISON and CC to the programs and flags you want to
-use.  They default to bison and gcc.  To run a non-installed bison
-from a tarball built in _build, I suggest the following.
-
-     BISON=_build/tests/bison CC='gcc -O2' ./bench.pl
-
-(The _build/tests/bison wrapper makes sure that _build/src/bison will
-use the tarballs' skeletons, not those already installed as a
-straightforward use of _build/src/bison would.)
-
---
-
-Copyright (C) 2006, 2009-2015, 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/>.
-
-Local Variables:
-mode: outline
-End:

etc/README.md

@@ -0,0 +1,36 @@
+# bench.pl
+A primitive Perl script to run benches.  Currently its only bench is the
+usual calculator: it has a lightweight processing part (but not null), so it
+is really emphasizing the cost of the whole parsing (including scanning and
+I/O).
+
+Set the envvars `BISON` and `CC` to the programs and flags you want to use.
+They default to `bison` and `gcc`.  To run a non-installed bison from a
+tarball built in _build, I suggest the following.
+
+    BISON=_build/tests/bison CC='gcc -O2' ./bench.pl
+
+(The `_build/tests/bison` wrapper makes sure that `_build/src/bison` will
+use the tarballs' skeletons, not those already installed as a
+straightforward use of `_build/src/bison` would.)
+
+<!--
+
+Local Variables:
+mode: markdown
+fill-column: 76
+ispell-dictionary: "american"
+End:
+
+Copyright (C) 2006, 2009-2015, 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.
+
+-->

etc/local.mk

@@ -14,4 +14,5 @@
 ## You should have received a copy of the GNU General Public License
 ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-nodist_noinst_SCRIPTS = etc/bench.pl
+dist_noinst_DATA = %D%/README.md
+nodist_noinst_SCRIPTS = %D%/bench.pl