===================================================================
RCS file: /cvs/mandoc/roff.7,v
retrieving revision 1.71
retrieving revision 1.72
diff -u -p -r1.71 -r1.72
--- mandoc/roff.7	2015/04/29 18:35:00	1.71
+++ mandoc/roff.7	2015/05/31 23:13:22	1.72
@@ -1,4 +1,4 @@
-.\"	$Id: roff.7,v 1.71 2015/04/29 18:35:00 schwarze Exp $
+.\"	$Id: roff.7,v 1.72 2015/05/31 23:13:22 schwarze Exp $
 .\"
 .\" Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013, 2014 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 29 2015 $
+.Dd $Mdocdate: May 31 2015 $
 .Dt ROFF 7
 .Os
 .Sh NAME
@@ -1057,14 +1057,17 @@ If the first character of COND is
 .Pq string defined ,
 .Sq e
 .Pq even page ,
-.Sq r
-.Pq register accessed ,
 .Sq t
 .Pq troff mode ,
 or
 .Sq v
 .Pq vroff mode ,
 COND evaluates to false.
+.It
+If the first character of COND is
+.Sq r ,
+it evalutes to true if the rest of COND is the name of an existing
+number register; otherwise, it evaluates to false.
 .It
 If COND starts with a parenthesis or with an optionally signed
 integer number, it is evaluated according to the rules of