document that the 'e' command is non-portable; from kshe; ok jmc@

diff --git a/usr.bin/dc/dc.1 b/usr.bin/dc/dc.1
index 8c2a4d1..e24cb60 100644 (file)
--- a/usr.bin/dc/dc.1
+++ b/usr.bin/dc/dc.1
@@ -1,4 +1,4 @@
-.\"    $OpenBSD: dc.1,v 1.30 2017/02/23 06:40:17 otto Exp $
+.\"    $OpenBSD: dc.1,v 1.31 2017/11/28 06:51:19 otto Exp $
 .\"
 .\" Copyright (C) Caldera International Inc.  2001-2002.
 .\" All rights reserved.
@@ -34,7 +34,7 @@
 .\"
 .\"    @(#)dc.1        8.1 (Berkeley) 6/6/93
 .\"
-.Dd $Mdocdate: February 23 2017 $
+.Dd $Mdocdate: November 28 2017 $
 .Dt DC 1
 .Os
 .Sh NAME
@@ -189,6 +189,7 @@ The top value on the stack is duplicated.
 Equivalent to
 .Ic p ,
 except that the output is written to the standard error stream.
+This is a non-portable extension.
 .It Ic f
 All values on the stack are printed, separated by newlines.
 .It Ic G