===================================================================
RCS file: /cvs/mandoc/mdoc.7,v
retrieving revision 1.150
retrieving revision 1.152
diff -u -p -r1.150 -r1.152
--- mandoc/mdoc.7	2010/08/22 14:54:29	1.150
+++ mandoc/mdoc.7	2010/08/24 12:18:49	1.152
@@ -1,4 +1,4 @@
-.\"	$Id: mdoc.7,v 1.150 2010/08/22 14:54:29 kristaps Exp $
+.\"	$Id: mdoc.7,v 1.152 2010/08/24 12:18:49 kristaps Exp $
 .\"
 .\" Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010 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: August 22 2010 $
+.Dd $Mdocdate: August 24 2010 $
 .Dt MDOC 7
 .Os
 .Sh NAME
@@ -2844,6 +2844,8 @@ The
 .Pq text colour ,
 .Sq \eM
 .Pq text filling colour ,
+.Sq \ez
+.Pq zero-length character ,
 and
 .Sq \es
 .Pq text size
@@ -2861,6 +2863,17 @@ This is not supported by mandoc.
 .Sh SEE ALSO
 .Xr mandoc 1 ,
 .Xr mandoc_char 7
+.Sh HISTORY
+The
+.Nm
+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.
+The standalone implementation that is part of the
+.Xr mandoc 1
+utility written by Kristaps Dzonsons appeared in
+.Ox 4.6 .
 .Sh AUTHORS
 The
 .Nm