===================================================================
RCS file: /cvs/mandoc/mandoc.1,v
retrieving revision 1.255
retrieving revision 1.257
diff -u -p -r1.255 -r1.257
--- mandoc/mandoc.1	2022/02/08 18:30:22	1.255
+++ mandoc/mandoc.1	2022/04/24 13:38:46	1.257
@@ -1,6 +1,6 @@
-.\" $OpenBSD: mandoc.1,v 1.255 2022/02/08 18:30:22 schwarze Exp $
+.\" $Id: mandoc.1,v 1.257 2022/04/24 13:38:46 schwarze Exp $
 .\"
-.\" Copyright (c) 2012, 2014-2021 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2012, 2014-2022 Ingo Schwarze <schwarze@openbsd.org>
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
@@ -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: February 8 2022 $
+.Dd $Mdocdate: April 24 2022 $
 .Dt MANDOC 1
 .Os
 .Sh NAME
@@ -487,10 +487,10 @@ Use
 to translate
 .Xr mdoc 7
 input to the markdown format conforming to
-.Lk http://daringfireball.net/projects/markdown/syntax.text\
+.Lk https://daringfireball.net/projects/markdown/syntax.text\
  "John Gruber's 2004 specification" .
 The output also almost conforms to the
-.Lk http://commonmark.org/ CommonMark
+.Lk https://commonmark.org/ CommonMark
 specification.
 .Pp
 The character set used for the markdown output is ASCII.
@@ -2082,6 +2082,13 @@ and expands to the empty string.
 .Pq roff
 The argument of the escape sequence \e$ is not a digit;
 the escape sequence expands to the empty string.
+.It Sy "negative argument, using 0"
+.Pq roff
+A
+.Ic \&shift
+request has a negative argument
+or an argument that is negative due to integer overflow.
+Macro argument numbering remains unchanged.
 .It Sy "NOT IMPLEMENTED: Bd -file"
 .Pq mdoc
 For security reasons, the