===================================================================
RCS file: /cvs/mandoc/tbl_data.c,v
retrieving revision 1.47
retrieving revision 1.53
diff -u -p -r1.47 -r1.53
--- mandoc/tbl_data.c	2018/11/25 21:17:34	1.47
+++ mandoc/tbl_data.c	2020/01/11 20:48:18	1.53
@@ -1,7 +1,7 @@
-/*	$Id: tbl_data.c,v 1.47 2018/11/25 21:17:34 schwarze Exp $ */
+/*	$Id: tbl_data.c,v 1.53 2020/01/11 20:48:18 schwarze Exp $ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011, 2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011,2015,2017,2018,2019 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
@@ -21,14 +21,17 @@
 
 #include <assert.h>
 #include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 
-#include "mandoc.h"
 #include "mandoc_aux.h"
+#include "mandoc.h"
+#include "tbl.h"
 #include "libmandoc.h"
-#include "libroff.h"
+#include "tbl_int.h"
 
 static	void		 getdata(struct tbl_node *, struct tbl_span *,
 				int, const char *, int *);
@@ -71,12 +74,13 @@ getdata(struct tbl_node *tbl, struct tbl_span *dp,
 		if (dp->layout->last->col + 1 < dp->opts->cols) {
 			cp = mandoc_calloc(1, sizeof(*cp));
 			cp->pos = TBL_CELL_LEFT;
+			cp->spacing = SIZE_MAX;
 			dp->layout->last->next = cp;
 			cp->col = dp->layout->last->col + 1;
 			dp->layout->last = cp;
 		} else {
-			mandoc_msg(MANDOCERR_TBLDATA_EXTRA, tbl->parse,
-			    ln, sv, p + sv);
+			mandoc_msg(MANDOCERR_TBLDATA_EXTRA,
+			    ln, sv, "%s", p + sv);
 			while (p[*pos] != '\0')
 				(*pos)++;
 			return;
@@ -169,7 +173,7 @@ getdata(struct tbl_node *tbl, struct tbl_span *dp,
 	    dat->layout->pos == TBL_CELL_DOWN) &&
 	    dat->pos == TBL_DATA_DATA && *dat->string != '\0')
 		mandoc_msg(MANDOCERR_TBLDATA_SPAN,
-		    tbl->parse, ln, sv, dat->string);
+		    ln, sv, "%s", dat->string);
 }
 
 void
@@ -208,8 +212,8 @@ tbl_cdata(struct tbl_node *tbl, int ln, const char *p,
 		dat->string = mandoc_strdup(p + pos);
 
 	if (dat->layout->pos == TBL_CELL_DOWN)
-		mandoc_msg(MANDOCERR_TBLDATA_SPAN, tbl->parse,
-		    ln, pos, dat->string);
+		mandoc_msg(MANDOCERR_TBLDATA_SPAN,
+		    ln, pos, "%s", dat->string);
 }
 
 static struct tbl_span *
@@ -246,14 +250,27 @@ tbl_data(struct tbl_node *tbl, int ln, const char *p, 
 
 	assert(rp != NULL);
 
-	if ( ! strcmp(p, "_")) {
-		sp = newspan(tbl, ln, rp);
-		sp->pos = TBL_SPAN_HORIZ;
-		return;
-	} else if ( ! strcmp(p, "=")) {
-		sp = newspan(tbl, ln, rp);
-		sp->pos = TBL_SPAN_DHORIZ;
-		return;
+	if (p[1] == '\0') {
+		switch (p[0]) {
+		case '.':
+			/*
+			 * Empty request lines must be handled here
+			 * and cannot be discarded in roff_parseln()
+			 * because in the layout section, they
+			 * are significant and end the layout.
+			 */
+			return;
+		case '_':
+			sp = newspan(tbl, ln, rp);
+			sp->pos = TBL_SPAN_HORIZ;
+			return;
+		case '=':
+			sp = newspan(tbl, ln, rp);
+			sp->pos = TBL_SPAN_DHORIZ;
+			return;
+		default:
+			break;
+		}
 	}
 
 	/*