From a5c677ee3a4424a0bf941147a939dc444d3849cb Mon Sep 17 00:00:00 2001
From: Ingo Schwarze <schwarze@openbsd.org>
Date: Sat, 4 Apr 2015 11:44:43 +0000
Subject: Fix a quirk with respect to empty .HP. Found while writing a
 regression test for man_macro.c rev. 1.66. Incidentally, this brings
 rendering of XFreeEventData(3) closer to groff.

---
 man_term.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/man_term.c b/man_term.c
index 0404731a..8272456c 100644
--- a/man_term.c
+++ b/man_term.c
@@ -1,4 +1,4 @@
-/*	$Id: man_term.c,v 1.173 2015/04/02 23:48:19 schwarze Exp $ */
+/*	$Id: man_term.c,v 1.174 2015/04/04 11:44:43 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -533,6 +533,17 @@ post_HP(DECL_ARGS)
 	switch (n->type) {
 	case ROFFT_BODY:
 		term_newln(p);
+
+		/*
+		 * Compatibility with a groff bug.
+		 * The .HP macro uses the undocumented .tag request
+		 * which causes a line break and cancels no-space
+		 * mode even if there isn't any output.
+		 */
+
+		if (n->child == NULL)
+			term_vspace(p);
+
 		p->flags &= ~(TERMP_NOBREAK | TERMP_BRIND);
 		p->trailspace = 0;
 		p->offset = mt->offset;
-- 
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