===================================================================
RCS file: /cvs/mandoc/mdoc.7,v
retrieving revision 1.278
retrieving revision 1.279
diff -u -p -r1.278 -r1.279
--- mandoc/mdoc.7	2019/04/24 13:15:00	1.278
+++ mandoc/mdoc.7	2019/07/15 19:20:30	1.279
@@ -1,4 +1,4 @@
-.\"	$Id: mdoc.7,v 1.278 2019/04/24 13:15:00 schwarze Exp $
+.\"	$Id: mdoc.7,v 1.279 2019/07/15 19:20:30 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013-2018 Ingo Schwarze <schwarze@openbsd.org>
@@ -15,7 +15,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: April 24 2019 $
+.Dd $Mdocdate: July 15 2019 $
 .Dt MDOC 7
 .Os
 .Sh NAME
@@ -3005,6 +3005,13 @@ in the same way as a plain
 .Sq \&|
 character.
 Using this predefined string is not recommended in new manuals.
+.Pp
+Appending a zero-width space
+.Pq Sq \e&
+to the end of an input line is also useful to prevent the interpretation
+of a trailing period, exclamation or question mark as the end of a
+sentence, for example when an abbreviation happens to occur
+at the end of a text or macro input line.
 .Ss Font handling
 In
 .Nm