===================================================================
RCS file: /cvs/mandoc/mdoc.7,v
retrieving revision 1.241
retrieving revision 1.243
diff -u -p -r1.241 -r1.243
--- mandoc/mdoc.7	2014/11/16 20:46:21	1.241
+++ mandoc/mdoc.7	2014/11/28 18:09:01	1.243
@@ -1,4 +1,4 @@
-.\"	$Id: mdoc.7,v 1.241 2014/11/16 20:46:21 schwarze Exp $
+.\"	$Id: mdoc.7,v 1.243 2014/11/28 18:09:01 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013 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: November 16 2014 $
+.Dd $Mdocdate: November 28 2014 $
 .Dt MDOC 7
 .Os
 .Sh NAME
@@ -1185,13 +1185,12 @@ See also
 and
 .Sx \&Dl .
 .Ss \&Db
-Switch debugging mode.
-Its syntax is as follows:
-.Pp
-.D1 Pf \. Sx \&Db Cm on | off
-.Pp
-This macro is ignored by
-.Xr mandoc 1 .
+This macro is obsolete.
+No replacement is needed.
+It is ignored by
+.Xr mandoc 1
+and groff including its arguments.
+It was formerly used to toggle a debugging mode.
 .Ss \&Dc
 Close a
 .Sx \&Do
@@ -1386,12 +1385,7 @@ where relevant, for example
 .Cm i386 ,
 or
 .Cm sparc64 .
-The list of supported architectures varies by operating system.
-For the full list of all architectures recognized by
-.Xr mandoc 1 ,
-see the file
-.Pa arch.in
-in the source distribution.
+The list of valid architectures varies by operating system.
 .El
 .Pp
 Examples: