===================================================================
RCS file: /cvs/mandoc/tbl_data.c,v
retrieving revision 1.51
retrieving revision 1.55
diff -u -p -r1.51 -r1.55
--- mandoc/tbl_data.c	2018/12/14 05:18:03	1.51
+++ mandoc/tbl_data.c	2021/05/18 13:22:43	1.55
@@ -1,7 +1,7 @@
-/*	$Id: tbl_data.c,v 1.51 2018/12/14 05:18:03 schwarze Exp $ */
+/*	$Id: tbl_data.c,v 1.55 2021/05/18 13:22:43 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) 2011,2015,2017-2019,2021 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
@@ -21,6 +21,7 @@
 
 #include <assert.h>
 #include <ctype.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -45,6 +46,7 @@ getdata(struct tbl_node *tbl, struct tbl_span *dp,
 	struct tbl_dat	*dat, *pdat;
 	struct tbl_cell	*cp;
 	struct tbl_span	*pdp;
+	const char	*ccp;
 	int		 sv;
 
 	/*
@@ -53,8 +55,11 @@ getdata(struct tbl_node *tbl, struct tbl_span *dp,
 	 */
 
 	sv = *pos;
-	while (p[*pos] != '\0' && p[*pos] != tbl->opts.tab)
-		(*pos)++;
+	ccp = p + sv;
+	while (*ccp != '\0' && *ccp != tbl->opts.tab)
+		if (*ccp++ == '\\')
+			mandoc_escape(&ccp, NULL, NULL);
+	*pos = ccp - p;
 
 	/* Advance to the next layout cell, skipping spanners. */
 
@@ -73,6 +78,7 @@ 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;
@@ -242,20 +248,34 @@ tbl_data(struct tbl_node *tbl, int ln, const char *p, 
 	struct tbl_cell	*cp;
 	struct tbl_span	*sp;
 
-	rp = (sp = tbl->last_span) == NULL ? tbl->first_row :
-	    sp->pos == TBL_SPAN_DATA && sp->layout->next != NULL ?
-	    sp->layout->next : sp->layout;
-
+	for (sp = tbl->last_span; sp != NULL; sp = sp->prev)
+		if (sp->pos == TBL_SPAN_DATA)
+			break;
+	rp = sp == NULL ? tbl->first_row :
+	    sp->layout->next == NULL ? sp->layout : sp->layout->next;
 	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;
+		}
 	}
 
 	/*