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-rw-r--r--mandoc.121
1 files changed, 16 insertions, 5 deletions
diff --git a/mandoc.1 b/mandoc.1
index e2cd0b5c..aa6274ae 100644
--- a/mandoc.1
+++ b/mandoc.1
@@ -1,4 +1,4 @@
-.\" $Id: mandoc.1,v 1.259 2022/06/05 13:54:09 schwarze Exp $
+.\" $Id: mandoc.1,v 1.260 2022/06/07 09:54:40 schwarze Exp $
.\"
.\" Copyright (c) 2012, 2014-2022 Ingo Schwarze <schwarze@openbsd.org>
.\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
@@ -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: June 5 2022 $
+.Dd $Mdocdate: June 7 2022 $
.Dt MANDOC 1
.Os
.Sh NAME
@@ -1797,10 +1797,9 @@ it is hard to predict which tab stop position the tab will advance to.
.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"
+.It Sy "invalid escape sequence argument"
.Pq roff
-An escape sequence has an invalid opening argument delimiter
-or the argument is of an invalid form.
+The argument of an escape sequence is of an invalid form.
Invalid escape sequences are ignored.
.It Sy "undefined escape, printing literally"
.Pq roff
@@ -2314,6 +2313,18 @@ The escape sequence is ignored.
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