mdocml: Let .Aq/.Ao/.Ac print "<>" instead of the normal "\(la\(ra"

mdocml: Let .Aq/.Ao/.Ac print "<>" instead of the normal "\(la\(ra"

[schwarze]

Log Message:
-----------
Let .Aq/.Ao/.Ac print "<>" instead of the normal "\(la\(ra" 
when the only child is .Mt, not when the preceding node is .An, 
to improve robustness.  Triggered by a question from Svyatoslav
Mishyn <juef at openmailbox dot org> (Crux Linux).

Modified Files:
--------------
    mdocml:
        mdoc_html.c
        mdoc_man.c
        mdoc_term.c

Revision Data
-------------
Index: mdoc_man.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_man.c,v
retrieving revision 1.81
retrieving revision 1.82
diff -Lmdoc_man.c -Lmdoc_man.c -u -p -r1.81 -r1.82
--- mdoc_man.c
+++ mdoc_man.c
@@ -1,6 +1,6 @@
 /*	$Id$ */
 /*
- * Copyright (c) 2011, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2011-2015 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
@@ -879,8 +879,8 @@ static int
 pre_aq(DECL_ARGS)
 {
 
-	print_word(n->parent->prev != NULL &&
-	    n->parent->prev->tok == MDOC_An ?  "<" : "\\(la");
+	print_word(n->nchild == 1 &&
+	    n->child->tok == MDOC_Mt ?  "<" : "\\(la");
 	outflags &= ~MMAN_spc;
 	return(1);
 }
@@ -890,8 +890,8 @@ post_aq(DECL_ARGS)
 {
 
 	outflags &= ~(MMAN_spc | MMAN_nl);
-	print_word(n->parent->prev != NULL &&
-	    n->parent->prev->tok == MDOC_An ?  ">" : "\\(ra");
+	print_word(n->nchild == 1 &&
+	    n->child->tok == MDOC_Mt ?  ">" : "\\(ra");
 }
 
 static int
Index: mdoc_html.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_html.c,v
retrieving revision 1.218
retrieving revision 1.219
diff -Lmdoc_html.c -Lmdoc_html.c -u -p -r1.218 -r1.219
--- mdoc_html.c
+++ mdoc_html.c
@@ -1,7 +1,7 @@
 /*	$Id$ */
 /*
  * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2014, 2015 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
@@ -2084,8 +2084,8 @@ mdoc_quote_pre(MDOC_ARGS)
 	case MDOC_Ao:
 		/* FALLTHROUGH */
 	case MDOC_Aq:
-		print_text(h, n->parent->prev != NULL &&
-		    n->parent->prev->tok == MDOC_An ?  "<" : "\\(la");
+		print_text(h, n->nchild == 1 &&
+		    n->child->tok == MDOC_Mt ?  "<" : "\\(la");
 		break;
 	case MDOC_Bro:
 		/* FALLTHROUGH */
@@ -2162,8 +2162,8 @@ mdoc_quote_post(MDOC_ARGS)
 	case MDOC_Ao:
 		/* FALLTHROUGH */
 	case MDOC_Aq:
-		print_text(h, n->parent->prev != NULL &&
-		    n->parent->prev->tok == MDOC_An ?  ">" : "\\(ra");
+		print_text(h, n->nchild == 1 &&
+		    n->child->tok == MDOC_Mt ?  ">" : "\\(ra");
 		break;
 	case MDOC_Bro:
 		/* FALLTHROUGH */
Index: mdoc_term.c
===================================================================
RCS file: /home/cvs/mdocml/mdocml/mdoc_term.c,v
retrieving revision 1.302
retrieving revision 1.303
diff -Lmdoc_term.c -Lmdoc_term.c -u -p -r1.302 -r1.303
--- mdoc_term.c
+++ mdoc_term.c
@@ -1,7 +1,7 @@
 /*	$Id$ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2010, 2012, 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2010, 2012-2015 Ingo Schwarze <schwarze@openbsd.org>
  * Copyright (c) 2013 Franco Fichtner <franco@lastsummer.de>
  *
  * Permission to use, copy, modify, and distribute this software for any
@@ -1855,8 +1855,8 @@ termp_quote_pre(DECL_ARGS)
 	case MDOC_Ao:
 		/* FALLTHROUGH */
 	case MDOC_Aq:
-		term_word(p, n->parent->prev != NULL &&
-		    n->parent->prev->tok == MDOC_An ?  "<" : "\\(la");
+		term_word(p, n->nchild == 1 &&
+		    n->child->tok == MDOC_Mt ? "<" : "\\(la");
 		break;
 	case MDOC_Bro:
 		/* FALLTHROUGH */
@@ -1928,8 +1928,8 @@ termp_quote_post(DECL_ARGS)
 	case MDOC_Ao:
 		/* FALLTHROUGH */
 	case MDOC_Aq:
-		term_word(p, n->parent->prev != NULL &&
-		    n->parent->prev->tok == MDOC_An ?  ">" : "\\(ra");
+		term_word(p, n->nchild == 1 &&
+		    n->child->tok == MDOC_Mt ? ">" : "\\(ra");
 		break;
 	case MDOC_Bro:
 		/* FALLTHROUGH */
--
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