===================================================================
RCS file: /cvs/docbook2mdoc/macro.c,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -p -r1.19 -r1.20
--- docbook2mdoc/macro.c	2019/05/02 04:12:18	1.19
+++ docbook2mdoc/macro.c	2019/05/02 12:40:42	1.20
@@ -1,4 +1,4 @@
-/* $Id: macro.c,v 1.19 2019/05/02 04:12:18 schwarze Exp $ */
+/* $Id: macro.c,v 1.20 2019/05/02 12:40:42 schwarze Exp $ */
 /*
  * Copyright (c) 2019 Ingo Schwarze <schwarze@openbsd.org>
  *
@@ -248,6 +248,8 @@ macro_nodeline(struct format *f, const char *name, str
 void
 print_text(struct format *f, const char *word, int flags)
 {
+	int	 ateos, inword;
+
 	para_check(f);
 	switch (f->linestate) {
 	case LINE_NEW:
@@ -262,7 +264,53 @@ print_text(struct format *f, const char *word, int fla
 	}
 	if (f->linestate == LINE_NEW && (*word == '.' || *word == '\''))
 		fputs("\\&", stdout);
+	ateos = inword = 0;
 	while (*word != '\0') {
+		if (f->nofill == 0) {
+			switch (*word) {
+			case ' ':
+				if (ateos == 0) {
+					inword = 0;
+					break;
+				}
+				ateos = inword = 0;
+				/* Handle the end of a sentence. */
+				while (*word == ' ')
+					word++;
+				switch (*word) {
+				case '\0':
+					break;
+				case '\'':
+				case '.':
+					fputs("\n\\&", stdout);
+					break;
+				default:
+					putchar('\n');
+					break;
+				}
+				continue;
+			/* Detect the end of a sentence. */
+			case '!':
+			case '.':
+			case '?':
+				if (inword > 1 &&
+				    (word[-2] != 'n' || word[-1] != 'c') &&
+				    (word[-2] != 'v' || word[-1] != 's'))
+					ateos = 1;
+				/* FALLTHROUGH */
+			case '"':
+			case '\'':
+			case ')':
+			case ']':
+				inword = 0;
+				break;
+			default:
+				if (isalnum((unsigned char)*word))
+					inword++;
+				ateos = 0;
+				break;
+			}
+		}
 		putchar(*word);
 		if (*word++ == '\\')
 			putchar('e');