===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/mandoc.1,v
retrieving revision 1.88
retrieving revision 1.89
diff -c -r1.88 -r1.89
*** src/usr.bin/mandoc/mandoc.1	2015/11/05 17:47:53	1.88
--- src/usr.bin/mandoc/mandoc.1	2016/12/28 17:21:17	1.89
***************
*** 1,4 ****
! .\"	$OpenBSD: mandoc.1,v 1.88 2015/11/05 17:47:53 schwarze Exp $
  .\"
  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  .\" Copyright (c) 2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
--- 1,4 ----
! .\"	$OpenBSD: mandoc.1,v 1.89 2016/12/28 17:21:17 schwarze Exp $
  .\"
  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  .\" Copyright (c) 2012, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
***************
*** 15,21 ****
  .\" 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 5 2015 $
  .Dt MANDOC 1
  .Os
  .Sh NAME
--- 15,21 ----
  .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  .\"
! .Dd $Mdocdate: December 28 2016 $
  .Dt MANDOC 1
  .Os
  .Sh NAME
***************
*** 1147,1152 ****
--- 1147,1159 ----
  .Ic \&Re
  macro on the next input line.
  Such an empty block does not produce any output.
+ .It Sy "missing section argument"
+ .Pq mdoc
+ An
+ .Ic \&Xr
+ macro lacks its second, section number argument.
+ The first argument, i.e. the name, is printed, but without subsequent
+ parantheses.
  .It Sy "missing -std argument, adding it"
  .Pq mdoc
  An