===================================================================
RCS file: /cvs/mandoc/man_term.c,v
retrieving revision 1.214
retrieving revision 1.217
diff -u -p -r1.214 -r1.217
--- mandoc/man_term.c	2018/08/17 20:33:37	1.214
+++ mandoc/man_term.c	2018/08/18 14:02:56	1.217
@@ -1,4 +1,4 @@
-/*	$Id: man_term.c,v 1.214 2018/08/17 20:33:37 schwarze Exp $ */
+/*	$Id: man_term.c,v 1.217 2018/08/18 14:02:56 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>
@@ -78,6 +78,7 @@ static	int		  pre_PP(DECL_ARGS);
 static	int		  pre_RS(DECL_ARGS);
 static	int		  pre_SH(DECL_ARGS);
 static	int		  pre_SS(DECL_ARGS);
+static	int		  pre_SY(DECL_ARGS);
 static	int		  pre_TP(DECL_ARGS);
 static	int		  pre_UR(DECL_ARGS);
 static	int		  pre_alternate(DECL_ARGS);
@@ -90,6 +91,7 @@ static	void		  post_HP(DECL_ARGS);
 static	void		  post_RS(DECL_ARGS);
 static	void		  post_SH(DECL_ARGS);
 static	void		  post_SS(DECL_ARGS);
+static	void		  post_SY(DECL_ARGS);
 static	void		  post_TP(DECL_ARGS);
 static	void		  post_UR(DECL_ARGS);
 
@@ -124,6 +126,8 @@ static const struct man_term_act man_term_acts[MAN_MAX
 	{ pre_PD, NULL, MAN_NOTEXT }, /* PD */
 	{ pre_ign, NULL, 0 }, /* AT */
 	{ pre_in, NULL, MAN_NOTEXT }, /* in */
+	{ pre_SY, post_SY, 0 }, /* SY */
+	{ NULL, NULL, 0 }, /* YS */
 	{ pre_OP, NULL, 0 }, /* OP */
 	{ pre_literal, NULL, 0 }, /* EX */
 	{ pre_literal, NULL, 0 }, /* EE */
@@ -342,7 +346,7 @@ pre_OP(DECL_ARGS)
 {
 
 	term_word(p, "[");
-	p->flags |= TERMP_NOSPACE;
+	p->flags |= TERMP_KEEP | TERMP_NOSPACE;
 
 	if (NULL != (n = n->child)) {
 		term_fontrepl(p, TERMFONT_BOLD);
@@ -354,6 +358,7 @@ pre_OP(DECL_ARGS)
 	}
 
 	term_fontrepl(p, TERMFONT_NONE);
+	p->flags &= ~TERMP_KEEP;
 	p->flags |= TERMP_NOSPACE;
 	term_word(p, "]");
 	return 0;
@@ -846,6 +851,63 @@ post_RS(DECL_ARGS)
 
 	if (--mt->lmarginsz < MAXMARGINS)
 		mt->lmargincur = mt->lmarginsz;
+}
+
+static int
+pre_SY(DECL_ARGS)
+{
+	const struct roff_node	*nn;
+	int			 len;
+
+	switch (n->type) {
+	case ROFFT_BLOCK:
+		if (n->prev == NULL || n->prev->tok != MAN_SY)
+			print_bvspace(p, n, mt->pardist);
+		return 1;
+	case ROFFT_HEAD:
+	case ROFFT_BODY:
+		break;
+	default:
+		abort();
+	}
+
+	nn = n->parent->head->child;
+	len = nn == NULL ? 0 : term_strlen(p, nn->string) + 1;
+
+	switch (n->type) {
+	case ROFFT_HEAD:
+		p->tcol->offset = mt->offset;
+		p->tcol->rmargin = mt->offset + len;
+		p->flags |= TERMP_NOBREAK;
+		term_fontrepl(p, TERMFONT_BOLD);
+		break;
+	case ROFFT_BODY:
+		mt->lmargin[mt->lmargincur] = len;
+		p->tcol->offset = mt->offset + len;
+		p->tcol->rmargin = p->maxrmargin;
+		p->flags |= TERMP_NOSPACE;
+		break;
+	default:
+		abort();
+	}
+	return 1;
+}
+
+static void
+post_SY(DECL_ARGS)
+{
+	switch (n->type) {
+	case ROFFT_HEAD:
+		term_flushln(p);
+		p->flags &= ~TERMP_NOBREAK;
+		break;
+	case ROFFT_BODY:
+		term_newln(p);
+		p->tcol->offset = mt->offset;
+		break;
+	default:
+		break;
+	}
 }
 
 static int