Fix the vertical spacing around tbl(7) instances in man(7).

Groff forces the document author to manually request sufficient spacing
after .TE - that is, at least .sp 1v after a table with the "box" option
and at least .sp 2v after a table with the "doublebox" option - or else
it clobbers the box.  I consider that insane, so i'm not imitating groff
in that respect.  Instead, i add at least as much vertical space as groff,
or more where required to avoid clobbering the box.

Consequently, output will be identical for input that looks sane with
groff, and mandoc will make output look better for input that looks bad
with groff.

"Please check them in and I'll look into them later!" kristaps@

3 files changed, 15 insertions, 7 deletions

diff --git a/tbl_term.c b/tbl_term.c
index 64107fb7..9f399d0c 100644
--- a/tbl_term.c
+++ b/tbl_term.c
@@ -1,4 +1,4 @@
-/*	$Id: tbl_term.c,v 1.23 2012/05/27 17:59:23 schwarze Exp $ */
+/*	$Id: tbl_term.c,v 1.24 2012/05/27 18:02:49 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
@@ -171,10 +171,14 @@ term_tbl(struct termp *tp, const struct tbl_span *sp)
 
 	if (TBL_SPAN_LAST & sp->flags) {
 		if (TBL_OPT_DBOX & sp->tbl->opts ||
-		    TBL_OPT_BOX  & sp->tbl->opts)
+		    TBL_OPT_BOX  & sp->tbl->opts) {
 			tbl_hframe(tp, sp, 0);
-		if (TBL_OPT_DBOX & sp->tbl->opts)
+			tp->skipvsp = 1;
+		}
+		if (TBL_OPT_DBOX & sp->tbl->opts) {
 			tbl_hframe(tp, sp, 1);
+			tp->skipvsp = 2;
+		}
 		assert(tp->tbl.cols);
 		free(tp->tbl.cols);
 		tp->tbl.cols = NULL;
diff --git a/term.c b/term.c
index 4ca15ed6..3dadb7e4 100644
--- a/term.c
+++ b/term.c
@@ -1,7 +1,7 @@
-/*	$Id: term.c,v 1.201 2011/09/21 09:57:13 schwarze Exp $ */
+/*	$Id: term.c,v 1.202 2012/05/27 18:02:49 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010, 2011, 2012 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -316,7 +316,10 @@ term_vspace(struct termp *p)
 
 	term_newln(p);
 	p->viscol = 0;
-	(*p->endline)(p);
+	if (0 < p->skipvsp)
+		p->skipvsp--;
+	else
+		(*p->endline)(p);
 }
 
 void
diff --git a/term.h b/term.h
index 56d076e5..1745a341 100644
--- a/term.h
+++ b/term.h
@@ -1,4 +1,4 @@
-/*	$Id: term.h,v 1.90 2011/12/04 23:10:52 schwarze Exp $ */
+/*	$Id: term.h,v 1.91 2012/05/27 18:02:49 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -63,6 +63,7 @@ struct	termp {
 	int		  col;		/* Bytes in buf. */
 	size_t		  viscol;	/* Chars on current line. */
 	int		  overstep;	/* See termp_flushln(). */
+	int		  skipvsp;	/* Vertical space to skip. */
 	int		  flags;
 #define	TERMP_SENTENCE	 (1 << 1)	/* Space before a sentence. */
 #define	TERMP_NOSPACE	 (1 << 2)	/* No space before words. */