===================================================================
RCS file: /cvs/mandoc/roff.7,v
retrieving revision 1.113
retrieving revision 1.115
diff -u -p -r1.113 -r1.115
--- mandoc/roff.7	2019/07/01 23:30:16	1.113
+++ mandoc/roff.7	2020/10/28 21:07:47	1.115
@@ -1,4 +1,4 @@
-.\"	$Id: roff.7,v 1.113 2019/07/01 23:30:16 schwarze Exp $
+.\"	$Id: roff.7,v 1.115 2020/10/28 21:07:47 schwarze Exp $
 .\"
 .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010-2019 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: July 1 2019 $
+.Dd $Mdocdate: October 28 2020 $
 .Dt ROFF 7
 .Os
 .Sh NAME
@@ -315,12 +315,18 @@ delimiters
 The proper spacing is also intelligently preserved if a sentence ends at
 the boundary of a macro line.
 .Pp
+If an input line happens to end with a period, exclamation or question
+mark that isn't the end of a sentence, append a zero-width space
+.Pq Sq \e& .
+.Pp
 Examples:
 .Bd -literal -offset indent -compact
 Do not end sentences mid-line like this.  Instead,
 end a sentence like this.
 A macro would end like this:
 \&.Xr mandoc 1 \&.
+An abbreviation at the end of an input line needs escaping, e.g.\e&
+like this.
 .Ed
 .Sh REQUEST SYNTAX
 A request or macro line consists of:
@@ -2325,7 +2331,7 @@ for
 .At v2 ,
 then ported nroff to C as troff, which Brian W. Kernighan released with
 .At v7 .
-In 1989, James Clarke re-implemented troff in C++, naming it groff.
+In 1989, James Clark re-implemented troff in C++, naming it groff.
 .Sh AUTHORS
 .An -nosplit
 This