===================================================================
RCS file: /cvs/mandoc/mandoc_char.7,v
retrieving revision 1.71
retrieving revision 1.78
diff -u -p -r1.71 -r1.78
--- mandoc/mandoc_char.7	2018/08/08 14:16:08	1.71
+++ mandoc/mandoc_char.7	2020/10/31 11:45:16	1.78
@@ -1,8 +1,8 @@
-.\"	$Id: mandoc_char.7,v 1.71 2018/08/08 14:16:08 schwarze Exp $
+.\"	$Id: mandoc_char.7,v 1.78 2020/10/31 11:45:16 schwarze Exp $
 .\"
 .\" Copyright (c) 2003 Jason McIntyre <jmc@openbsd.org>
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
-.\" Copyright (c) 2011, 2013, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2011,2013,2015,2017-2020 Ingo Schwarze <schwarze@openbsd.org>
 .\"
 .\" Permission to use, copy, modify, and distribute this software for any
 .\" purpose with or without fee is hereby granted, provided that the above
@@ -16,7 +16,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: August 8 2018 $
+.Dd $Mdocdate: October 31 2020 $
 .Dt MANDOC_CHAR 7
 .Os
 .Sh NAME
@@ -62,7 +62,7 @@ escape sequences to represent national language charac
 names; instead, provide ASCII transcriptions of the names.
 .Ss Dashes and Hyphens
 In typography there are different types of dashes of various width:
-the hyphen (-),
+the hyphen (\(hy),
 the en-dash (\(en),
 the em-dash (\(em),
 and the mathematical minus sign (\(mi).
@@ -107,8 +107,8 @@ supporting it, for example in
 .Fl T Cm utf8
 and
 .Fl T Cm html .
-But currently, no practically relevant manual page formatter actually
-requires that subtlety, so in manual pages just write plain
+But currently, no practically relevant manual page formatter requires
+that subtlety, so in manual pages, it is sufficient to write plain
 .Sq -
 to represent hyphen, minus, and hyphen-minus.
 .Pp
@@ -261,16 +261,18 @@ subsection of the
 .Xr roff 7
 manual.
 .Pp
-Spacing:
+Spaces, non-breaking unless stated otherwise:
 .Bl -column "Input" "Description" -offset indent -compact
 .It Em Input Ta Em Description
-.It Sq \e\ \& Ta unpaddable non-breaking space
-.It \e\(ti   Ta paddable non-breaking space
-.It \e0      Ta unpaddable, breaking digit-width space
+.It Sq \e\ \& Ta unpaddable space
+.It \e\(ti   Ta paddable space
+.It \e0      Ta digit-width space
 .It \e|      Ta one-sixth \e(em narrow space, zero width in nroff mode
 .It \e^      Ta one-twelfth \e(em half-narrow space, zero width in nroff
 .It \e&      Ta zero-width space
+.It \e)      Ta zero-width space transparent to end-of-sentence detection
 .It \e%      Ta zero-width space allowing hyphenation
+.It \e:      Ta zero-width space allowing line break
 .El
 .Pp
 Lines:
@@ -543,11 +545,13 @@ Accented letters:
 .It \e(\(aqI Ta \('I        Ta acute I
 .It \e(\(aqO Ta \('O        Ta acute O
 .It \e(\(aqU Ta \('U        Ta acute U
+.It \e(\(aqY Ta \('Y        Ta acute Y
 .It \e(\(aqa Ta \('a        Ta acute a
 .It \e(\(aqe Ta \('e        Ta acute e
 .It \e(\(aqi Ta \('i        Ta acute i
 .It \e(\(aqo Ta \('o        Ta acute o
 .It \e(\(aqu Ta \('u        Ta acute u
+.It \e(\(aqy Ta \('y        Ta acute y
 .It \e(\(gaA Ta \(`A        Ta grave A
 .It \e(\(gaE Ta \(`E        Ta grave E
 .It \e(\(gaI Ta \(`I        Ta grave I
@@ -705,11 +709,6 @@ Their syntax is similar to special characters, using
 and
 .Sq \e*[N]
 .Pq N-character .
-For details, see the
-.Em Predefined Strings
-subsection of the
-.Xr roff 7
-manual.
 .Bl -column "Input" "Rendered" "Description" -offset indent
 .It Em Input Ta Em Rendered Ta Em Description
 .It \e*(Ba   Ta \*(Ba       Ta vertical bar
@@ -761,14 +760,16 @@ For backward compatibility with existing manuals,
 .Xr mandoc 1
 also supports the
 .Pp
-.Dl \eN\(aq Ns Ar number Ns \(aq
+.Dl \eN\(aq Ns Ar number Ns \(aq and \e[ Ns Cm char Ns Ar number ]
 .Pp
-escape sequence, inserting the character
+escape sequences, inserting the character
 .Ar number
 from the current character set into the output.
 Of course, this is inherently non-portable and is already marked
-as deprecated in the Heirloom roff manual.
-For example, do not use \eN\(aq34\(aq, use \e(dq, or even the plain
+as deprecated in the Heirloom roff manual;
+on top of that, the second form is a GNU extension.
+For example, do not use \eN\(aq34\(aq or \e[char34], use \e(dq,
+or even the plain
 .Sq \(dq
 character where possible.
 .Sh COMPATIBILITY