===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/mandoc.1,v
retrieving revision 1.185
retrieving revision 1.186
diff -c -r1.185 -r1.186
*** src/usr.bin/mandoc/mandoc.1	2022/06/05 13:42:49	1.185
--- src/usr.bin/mandoc/mandoc.1	2022/06/07 09:51:03	1.186
***************
*** 1,4 ****
! .\" $OpenBSD: mandoc.1,v 1.185 2022/06/05 13:42:49 schwarze Exp $
  .\"
  .\" Copyright (c) 2012, 2014-2022 Ingo Schwarze <schwarze@openbsd.org>
  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
--- 1,4 ----
! .\" $OpenBSD: mandoc.1,v 1.186 2022/06/07 09:51:03 schwarze Exp $
  .\"
  .\" Copyright (c) 2012, 2014-2022 Ingo Schwarze <schwarze@openbsd.org>
  .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
***************
*** 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: June 5 2022 $
  .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: June 7 2022 $
  .Dt MANDOC 1
  .Os
  .Sh NAME
***************
*** 1797,1806 ****
  .Pq mdoc
  A new sentence starts in the middle of a text line.
  Start it on a new input line to help formatters produce correct spacing.
! .It Sy "invalid escape sequence"
  .Pq roff
! An escape sequence has an invalid opening argument delimiter
! or the argument is of an invalid form.
  Invalid escape sequences are ignored.
  .It Sy "undefined escape, printing literally"
  .Pq roff
--- 1797,1805 ----
  .Pq mdoc
  A new sentence starts in the middle of a text line.
  Start it on a new input line to help formatters produce correct spacing.
! .It Sy "invalid escape sequence argument"
  .Pq roff
! The argument of an escape sequence is of an invalid form.
  Invalid escape sequences are ignored.
  .It Sy "undefined escape, printing literally"
  .Pq roff
***************
*** 2314,2319 ****
--- 2313,2330 ----
  The name given in a special character escape sequence is not known to
  .Nm .
  The escape sequence is ignored.
+ .It Sy "invalid escape argument delimiter"
+ .Pq roff
+ An escape sequence that expects a numerical argument
+ attempts to employ one of the characters
+ .Qq " %&()*+-./0123456789:<=>"
+ as an argument delimiter.
+ The escape sequence is ignored including the invalid opening delimiter
+ and the rest of the argument may appear as output text.
+ While various charcters can be used as argument delimiters,
+ using the apostrophe-quote character
+ .Pq Sq \(aq
+ is recommended for readability and robustness.
  .El
  .Ss Unsupported features
  .Bl -ohang