Fix an error in the EXAMPLES section of getopt(1), which is based on

the same fix present in NetBSD.

Note: the getopt man page contains more antique information like this.
An overhaul of the man page and/or sync with NetBSD would be the right
thing to do. But since this is out of the scope of the PR, I'll leave
it as it is for now.

PR:             docs/133118
Submitted by:   Oleg A. Mamontov (oleg at mamontov dot net)
Discussed with: jilles@
MFC after:      2 weeks

usr.bin/getopt/getopt.1

@@ -1,6 +1,6 @@
 .\" $FreeBSD$
 .\"
-.Dd April 3, 1999
+.Dd July 7, 2010
 .Dt GETOPT 1
 .Os
 .Sh NAME
@@ -64,9 +64,9 @@ set \-\- $args
 # You cannot use the set command with a backquoted getopt directly,
 # since the exit code from getopt would be shadowed by those of set,
 # which is zero by definition.
-for i
+while true;
 do
-	case "$i"
+	case "$1"
 	in
 		\-a|\-b)
 			echo flag $i set; sflags="${i#-}$sflags";