Make "new sentence, new line" detection stricter:

Also catch cases where the new sentence starts with a one-letter word
and the input line is broken right after that word.
Suggested by Thomas Klausner <wiz @ NetBSD>.

It's merely a three-bit diff, changing one byte from 0x34 to 0x33,
so what can possibly go wrong...

diff --git a/usr.bin/mandoc/mdoc.c b/usr.bin/mandoc/mdoc.c
index 076f2a7..a788941 100644 (file)
--- a/usr.bin/mandoc/mdoc.c
+++ b/usr.bin/mandoc/mdoc.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: mdoc.c,v 1.153 2017/05/05 15:16:25 schwarze Exp $ */
+/*     $OpenBSD: mdoc.c,v 1.154 2017/06/07 20:30:13 schwarze Exp $ */
 /*
  * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2012-2017 Ingo Schwarze <schwarze@openbsd.org>
@@ -276,7 +276,7 @@ mdoc_ptext(struct roff_man *mdoc, int line, char *buf, int offs)
        for (c = buf + offs; c != NULL; c = strchr(c + 1, '.')) {
                if (c - buf < offs + 2)
                        continue;
-               if (end - c < 4)
+               if (end - c < 3)
                        break;
                if (isalpha((unsigned char)c[-2]) &&
                    isalpha((unsigned char)c[-1]) &&