===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/grep/grep.1,v
retrieving revision 1.45
retrieving revision 1.46
diff -u -r1.45 -r1.46
--- src/usr.bin/grep/grep.1	2017/12/10 09:17:24	1.45
+++ src/usr.bin/grep/grep.1	2019/07/17 04:24:20	1.46
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: grep.1,v 1.45 2017/12/10 09:17:24 jmc Exp $
+.\"	$OpenBSD: grep.1,v 1.46 2019/07/17 04:24:20 tedu Exp $
 .\" Copyright (c) 1980, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
 .\"
@@ -28,7 +28,7 @@
 .\"
 .\"	@(#)grep.1	8.3 (Berkeley) 4/18/94
 .\"
-.Dd $Mdocdate: December 10 2017 $
+.Dd $Mdocdate: July 17 2019 $
 .Dt GREP 1
 .Os
 .Sh NAME
@@ -131,8 +131,10 @@
 .Fl C
 options.
 .It Fl b
-The offset in bytes of a matched pattern is
-displayed in front of the respective matched line.
+Each output line is preceded by its position (in bytes) in the file.
+If option
+.Fl o
+is also specified, the position of the matched pattern is displayed.
 .It Fl C Ns Oo Ar num Oc , Fl -context Ns Op = Ns Ar num
 Print
 .Ar num