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From: Sevan Janiyan <sevan@FreeBSD.org>
Date: Fri, 30 Aug 2019 21:49:00 +0000 (UTC)
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Subject: svn commit: r351631 - head/share/man/man4
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Author: sevan (doc committer)
Date: Fri Aug 30 21:49:00 2019
New Revision: 351631
URL: https://svnweb.freebsd.org/changeset/base/351631

Log:
  Earliest reference to /dev/null I can find is in v4 sh(1) and nulldev in
  nsys/ken/subr.c
  via TUHS archive
  https://minnie.tuhs.org/cgi-bin/utree.pl?file=V4
  
  MFC after:	5 days

Modified:
  head/share/man/man4/null.4

Modified: head/share/man/man4/null.4
==============================================================================
--- head/share/man/man4/null.4	Fri Aug 30 20:54:30 2019	(r351630)
+++ head/share/man/man4/null.4	Fri Aug 30 21:49:00 2019	(r351631)
@@ -28,7 +28,7 @@
 .\"	@(#)null.4	8.1 (Berkeley) 6/5/93
 .\" $FreeBSD$
 .\"
-.Dd June 5, 1993
+.Dd August 30, 2019
 .Dt NULL 4
 .Os
 .Sh NAME
@@ -54,4 +54,4 @@ device is always zero.
 A
 .Nm
 device appeared in
-.At v7 .
+.At v4 .