mandoc: Tedu support for the -xsh4.2 argument to the mdoc(7) .St macro

mandoc: Tedu support for the -xsh4.2 argument to the mdoc(7) .St macro

[schwarze]

Log Message:
-----------
Tedu support for the -xsh4.2 argument to the mdoc(7) .St macro
because all of the following hold:
* It is an alias for a part of an ancient standard that is no longer important.
* To refer to that old standard, -xpg4.2 is readily available and portable.
* It is unused in OpenBSD, FreeBSD, and NetBSD.
* Groff never supported it.

I agreed with G. Branden Robinson that deleting this from mandoc
is preferable to adding it to groff.

Modified Files:
--------------
    mandoc:
        st.c
        mdoc.7

Revision Data
-------------
Index: st.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/st.c,v
retrieving revision 1.16
retrieving revision 1.17
diff -Lst.c -Lst.c -u -p -r1.16 -r1.17
--- st.c
+++ st.c
@@ -1,4 +1,4 @@
-/*	$Id$ */
+/* $Id$ */
 /*
  * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -67,7 +67,6 @@ LINE("-xpg4",		"X/Open Portability Guide
 LINE("-xpg4.2",		"X/Open Portability Guide Issue\\~4, Version\\~2 (\\(lqXPG4.2\\(rq)")
 LINE("-xbd5",		"X/Open Base Definitions Issue\\~5 (\\(lqXBD5\\(rq)")
 LINE("-xcu5",		"X/Open Commands and Utilities Issue\\~5 (\\(lqXCU5\\(rq)")
-LINE("-xsh4.2",		"X/Open System Interfaces and Headers Issue\\~4, Version\\~2 (\\(lqXSH4.2\\(rq)")
 LINE("-xsh5",		"X/Open System Interfaces and Headers Issue\\~5 (\\(lqXSH5\\(rq)")
 LINE("-xns5",		"X/Open Networking Services Issue\\~5 (\\(lqXNS5\\(rq)")
 LINE("-xns5.2",		"X/Open Networking Services Issue\\~5.2 (\\(lqXNS5.2\\(rq)")
Index: mdoc.7
===================================================================
RCS file: /home/cvs/mandoc/mandoc/mdoc.7,v
retrieving revision 1.288
retrieving revision 1.289
diff -Lmdoc.7 -Lmdoc.7 -u -p -r1.288 -r1.289
--- mdoc.7
+++ mdoc.7
@@ -1,4 +1,4 @@
-.\"	$Id$
+.\" $Id$
 .\"
 .\" Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 .\" Copyright (c) 2010, 2011, 2013-2020 Ingo Schwarze <schwarze@openbsd.org>
@@ -2486,10 +2486,7 @@ Based on POSIX.1 and POSIX.2, published 
 .br
 This standard was published in 1994.
 It was used as the basis for UNIX 95 certification.
-The following three refer to parts of it.
-.Pp
-.It \-xsh4.2
-.St -xsh4.2
+The following two refer to parts of it.
 .Pp
 .It \-xcurses4.2
 .St -xcurses4.2
--
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