Fix some grammatical errors in man pages.

Patch supplied by Joerg Niendorf in PR misc/36707, thanks.

bin/ksh/ksh.Man

@@ -1,5 +1,5 @@
 '\" t
-.\" $NetBSD: ksh.Man,v 1.19 2006/10/24 18:30:25 cbiere Exp $
+.\" $NetBSD: ksh.Man,v 1.20 2007/07/30 18:01:42 mjf Exp $
 .\"{{{}}}
 .\"{{{  Notes about man page
 .\"     - use the pseudo-macros .sh( and .sh) to begin and end sh-specific
@@ -439,7 +439,7 @@ or greater than, their second string operand, respectively.
 .IP \ \ \(bu
 The single argument form
 of \fBtest\fP, which tests if the argument has non-zero length, is not valid
-- explicit operators must be always be used, \fIe.g.\fP, instead of
+- explicit operators must always be used, \fIe.g.\fP, instead of
 .ce
 \fB[\fP \fIstr\fP \fB]\fP
 use

share/man/man4/options.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: options.4,v 1.351 2007/06/03 19:35:26 xtraeme Exp $
+.\"	$NetBSD: options.4,v 1.352 2007/07/30 18:01:41 mjf Exp $
 .\"
 .\" Copyright (c) 1996
 .\" 	Perry E. Metzger.  All rights reserved.
@@ -2407,7 +2407,7 @@ in the node
 if supported.
 .It Cd options POWERNOW_K8
 Include support for AMD Athlon 64 PowerNow! and Cool`n'Quiet
-Technology, used to change the cpu and voltage frequency
+Technology, used to change the cpu voltage and frequency
 on the fly.
 .El
 .Ss atari-specific Options