Do text production for .Bt, .Ex, .Rv, .Ud at the validation stage

rather than in the formatters.  Use NODE_NOSRC flag for .Lb and
NODE_NOSRC and NODE_NOPRT for .St.  Results in a more rigorous
syntax tree and in 135 lines less code.

This work was triggered by a question from Abhinav Upadhyay <er dot
abhinav dot upadhyay at gmail dot com> (NetBSD) on discuss@.

5 files changed, 44 insertions, 2 deletions

diff --git a/regress/usr.bin/mandoc/mdoc/Makefile b/regress/usr.bin/mandoc/mdoc/Makefile
index 532158bebad..86bdcb7a2ff 100644
--- a/regress/usr.bin/mandoc/mdoc/Makefile
+++ b/regress/usr.bin/mandoc/mdoc/Makefile
@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.31 2014/12/22 23:26:20 schwarze Exp $
+# $OpenBSD: Makefile,v 1.32 2017/01/11 17:39:45 schwarze Exp $
 
 SUBDIR  = Ad An Ap Aq Ar At Bd Bf Bk Bl Brq Bx Cd Cm
 SUBDIR += D1 Db Dd Dl Dq Dt Dv Em Eo Er Ev Ex Fd Fl Fo Ft Ic In Lb Li Lk
 SUBDIR += Ms Mt Nd Nm No Ns Oo Op Os Ox Pa Pf Pp Qq Rs Rv
-SUBDIR += Sh Sm Sq St Sx Sy Tn Ux Va Vt Xr blank break
+SUBDIR += Sh Sm Sq St Sx Sy Tn Ud Ux Va Vt Xr blank break
 
 .include "../Makefile.sub"
 .include <bsd.subdir.mk>
diff --git a/regress/usr.bin/mandoc/mdoc/Ud/Makefile b/regress/usr.bin/mandoc/mdoc/Ud/Makefile
new file mode 100644
index 00000000000..9bc871eed37
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Ud/Makefile
@@ -0,0 +1,6 @@
+# $OpenBSD: Makefile,v 1.1 2017/01/11 17:39:45 schwarze Exp $
+
+REGRESS_TARGETS	 = arg
+LINT_TARGETS	 = arg
+
+.include <bsd.regress.mk>
diff --git a/regress/usr.bin/mandoc/mdoc/Ud/arg.in b/regress/usr.bin/mandoc/mdoc/Ud/arg.in
new file mode 100644
index 00000000000..b5245a779a7
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Ud/arg.in
@@ -0,0 +1,19 @@
+.Dd January 11, 2017
+.Dt UD-ARG 1
+.Os OpenBSD
+.Sh NAME
+.Nm Ud-arg
+.Nd obsolete text production macros
+.Sh DESCRIPTION
+The newest branch is
+.Ud
+The stable branch
+.Bt
+It will be released shortly.
+.Pp
+With arg:
+.Ud bar
+.Bt foo
+.Ud one two
+.Bt one two
+end
diff --git a/regress/usr.bin/mandoc/mdoc/Ud/arg.out_ascii b/regress/usr.bin/mandoc/mdoc/Ud/arg.out_ascii
new file mode 100644
index 00000000000..ec9f73c72bc
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Ud/arg.out_ascii
@@ -0,0 +1,13 @@
+UD-ARG(1)                   General Commands Manual                  UD-ARG(1)
+
+NNAAMMEE
+     UUdd--aarrgg - obsolete text production macros
+
+DDEESSCCRRIIPPTTIIOONN
+     The newest branch is currently under development.  The stable branch is
+     currently in beta test.  It will be released shortly.
+
+     With arg: currently under development.  is currently in beta test.
+     currently under development.  is currently in beta test.  end
+
+OpenBSD                        January 11, 2017                        OpenBSD
diff --git a/regress/usr.bin/mandoc/mdoc/Ud/arg.out_lint b/regress/usr.bin/mandoc/mdoc/Ud/arg.out_lint
new file mode 100644
index 00000000000..854845cdd40
--- /dev/null
+++ b/regress/usr.bin/mandoc/mdoc/Ud/arg.out_lint
@@ -0,0 +1,4 @@
+mandoc: arg.in:15:2: ERROR: skipping all arguments: Ud bar
+mandoc: arg.in:16:2: ERROR: skipping all arguments: Bt foo
+mandoc: arg.in:17:2: ERROR: skipping all arguments: Ud one
+mandoc: arg.in:18:2: ERROR: skipping all arguments: Bt one