doc: check the rpcalc.

* doc/bison.texinfo: Tag rpcalc.y snippets.
	Add missing includes.
	(Rpcalc Rules): Don't issue leading tabs.
	Complete an Info menu.
	Use @result.
	* examples/rpcalc/local.mk: New.
	* examples/rpcalc/rpcalc.test: New.
	* examples/local.mk: Use them.
	* examples/mfcalc/mfcalc.test: Remove dup test.
	* examples/test: Disable debug traces.

examples/local.mk

@@ -20,3 +20,4 @@ TEST_LOG_COMPILER = $(top_srcdir)/examples/test
 
 include examples/calc++/local.mk
 include examples/mfcalc/local.mk
+include examples/rpcalc/local.mk

examples/mfcalc/mfcalc.test

@@ -19,7 +19,6 @@ cat >input <<EOF
 1+2*3
 EOF
 run 0 7
-run 0 7
 
 cat >input <<EOF
 (1+2) * 3

examples/rpcalc/.gitignore

@@ -0,0 +1,3 @@
+/calc.h
+/rpcalc.stamp
+/rpcalc.y

examples/rpcalc/local.mk

@@ -0,0 +1,57 @@
+## Process this file with automake to produce Makefile.in -*-Makefile-*-
+
+## Copyright (C) 2005-2006, 2008-2012 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# 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/>.
+
+## ------------ ##
+## Extracting.  ##
+## ------------ ##
+
+# Extract in src.
+$(top_srcdir)/examples/rpcalc/rpcalc.stamp: $(doc) $(extexi)
+	$(AM_V_GEN)rm -f $@ $@.tmp
+	$(AM_V_at)touch $@.tmp
+	$(AM_V_at)cd $(top_srcdir)/examples/rpcalc && \
+	   $(AWK) -f ../extexi -v VERSION="$(VERSION)" \
+	     ../../doc/bison.texinfo -- calc.h rpcalc.y
+	$(AM_V_at)mv $@.tmp $@
+
+$(rpcalc_extracted): $(top_srcdir)/examples/rpcalc/rpcalc.stamp
+	$(AM_V_GEN)if test -f $@; then :; else \
+	  rm -f $< && \
+	  $(MAKE) $(AM_MAKEFLAGS) $<; \
+	fi
+
+## -------------------- ##
+## Building & testing.  ##
+## -------------------- ##
+
+BUILT_SOURCES += $(rpcalc_sources)
+MAINTAINERCLEANFILES += $(top_srcdir)/examples/rpcalc/rpcalc.stamp $(rpcalc_sources)
+EXTRA_DIST += examples/rpcalc/rpcalc.stamp
+
+rpcalc_extracted =				\
+  examples/rpcalc/rpcalc.y
+rpcalc_sources =				\
+  $(rpcalc_extracted)
+
+check_PROGRAMS += examples/rpcalc/rpcalc
+examples_rpcalc_rpcalc_LDADD = -lm
+examples_rpcalc_rpcalc_SOURCES =		\
+  $(rpcalc_sources)
+
+examples_rpcalc_rpcalc_CPPFLAGS = -I$(top_srcdir)/examples/rpcalc
+TESTS += examples/rpcalc/rpcalc.test
+EXTRA_DIST += examples/rpcalc/rpcalc.test

examples/rpcalc/rpcalc.test

@@ -0,0 +1,46 @@
+#! /bin/sh
+
+# Copyright (C) 2005-2012 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# 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/>.
+
+cat >input <<EOF
+1 2 3 * +
+EOF
+run 0 7
+
+cat >input <<EOF
+1.1 2.2 3.3 * +
+EOF
+run 0 8.36
+
+cat >input <<EOF
+1 2 + 3 *
+EOF
+run 0 9
+
+cat >input <<EOF
+1 2 3 4 5 6 7 8 9 * * * * * * * *
+EOF
+run 0 362880
+
+cat >input <<EOF
+3 7 + 3 4 5 * + - n
+EOF
+run 0 13
+
+cat >input <<EOF
+3 4 ^
+EOF
+run 0 81

examples/test

@@ -1,5 +1,5 @@
 #! /bin/sh
-set -x
+
 # Copyright (C) 2005-2012 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify