-.\" $Id: mdoc.7,v 1.153 2010/08/24 13:07:01 kristaps Exp $
+.\" $Id: mdoc.7,v 1.155 2010/08/24 14:03:46 kristaps Exp $
.\"
.\" Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
.\" Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>
.Pq zero-length character ,
.Sq \ew
.Pq string length ,
+.Sq \ek
+.Pq horizontal position marker ,
and
.Sq \es
.Pq text size
language first appeared as a troff macro package in
.Bx 4.4 .
It was later significantly updated by Werner Lemberg and Ruslan Ermilov
-in groff-1.20.1.
+in groff-1.17.
The standalone implementation that is part of the
.Xr mandoc 1
utility written by Kristaps Dzonsons appeared in