more info from John Gardner about ASCII control chars in roff(7) input

[mandoc.git] / man.7

diff --git a/man.7 b/man.7
index 7706b5ca23df88bd4beabeabdf6585ec45635a4c..81e3fd7d30016c143e99592ce0234930aec5888a 100644 (file)
--- a/man.7
+++ b/man.7
@@ -1,7 +1,7 @@
-.\"    $Id: man.7,v 1.143 2019/03/02 22:04:40 schwarze Exp $
+.\"    $Id: man.7,v 1.145 2020/02/18 17:31:28 schwarze Exp $
 .\"
 .\" Copyright (c) 2009, 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
-.\" Copyright (c) 2011-2015,2017,2018,2019 Ingo Schwarze <schwarze@openbsd.org>
+.\" Copyright (c) 2011-2015, 2017-2020 Ingo Schwarze <schwarze@openbsd.org>
 .\" Copyright (c) 2017 Anthony Bentley <bentley@openbsd.org>
 .\" Copyright (c) 2010 Joerg Sonnenberger <joerg@netbsd.org>
 .\"
@@ -17,7 +17,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: March 2 2019 $
+.Dd $Mdocdate: February 18 2020 $
 .Dt MAN 7
 .Os
 .Sh NAME
@@ -127,6 +127,8 @@ Sets the volume for the footer for compatibility with man pages from
 .At
 releases.
 The optional arguments specify which release it is from.
+This macro is an extension that first appeared in
+.Bx 4.3 .
 .It Ic B
 Text is rendered in bold face.
 .It Ic BI
@@ -160,7 +162,9 @@ This has no effect unless the tabulator positions were changed with the
 .Ic ta
 request.
 .It Ic EE
-This is a non-standard GNU extension.
+This is a non-standard Version 9
+.At
+extension later adopted by GNU.
 In
 .Xr mandoc 1 ,
 it does the same as the
@@ -168,7 +172,9 @@ it does the same as the
 .Ic fi
 request (switch to fill mode).
 .It Ic EX
-This is a non-standard GNU extension.
+This is a non-standard Version 9
+.At
+extension later adopted by GNU.
 In
 .Xr mandoc 1 ,
 it does the same as the
@@ -251,8 +257,12 @@ is usually a command-line flag and
 .Ar value
 its argument.
 .It Ic P
-A synonym for
-.Ic PP .
+This synonym for
+.Ic PP
+is an
+.At III
+extension later adopted by
+.Bx 4.3 .
 .It Ic PD
 Specify the vertical space to be inserted before each new paragraph.
 .br
@@ -339,6 +349,9 @@ See also
 .It Ic SB
 Text is rendered in small size (one point smaller than the default font)
 bold face.
+This macro is an extension that probably first appeared in SunOS 4.0
+and was later adopted by GNU and by
+.Bx 4.4 .
 .It Ic SH
 Begin a section.
 The scope of a section is only closed by another section or the end of
@@ -431,6 +444,8 @@ Sets the volume for the footer for compatibility with man pages from
 .Bx
 releases.
 The optional first argument specifies which release it is from.
+This macro is an extension that first appeared in
+.Bx 3 .
 .It Ic UE
 End a uniform resource identifier block started with
 .Ic UR .
@@ -496,8 +511,8 @@ The syntax is as follows:
 .It Ic BI  Ta    n         Ta    current   Ta    \&
 .It Ic BR  Ta    n         Ta    current   Ta    \&
 .It Ic DT  Ta    0         Ta    current   Ta    \&
-.It Ic EE  Ta    0         Ta    current   Ta    GNU
-.It Ic EX  Ta    0         Ta    current   Ta    GNU
+.It Ic EE  Ta    0         Ta    current   Ta    Version 9 At
+.It Ic EX  Ta    0         Ta    current   Ta    Version 9 At
 .It Ic I   Ta    n         Ta    next-line Ta    \&
 .It Ic IB  Ta    n         Ta    current   Ta    \&
 .It Ic IR  Ta    n         Ta    current   Ta    \&