Support negative indentations for mdoc(7) displays and lists.

Not exactly recommended for use, rather for groff compatibility.
While here, introduce similar SHRT_MAX limits as in man(7),
fixing a few cases of infinite output found by jsg@ with afl.

1 files changed, 1 insertions, 1 deletions

diff --git a/term.c b/term.c
index 3efc2709..61fe0c3b 100644
--- a/term.c
+++ b/term.c
@@ -273,7 +273,7 @@ term_flushln(struct termp *p)
 	}
 
 	if (TERMP_HANG & p->flags) {
-		p->overstep = (int)(vis - maxvis +
+		p->overstep += (int)(p->offset + vis - p->rmargin +
 		    p->trailspace * (*p->width)(p, ' '));
 
 		/*