Add cross-references to test(1) and expr(1) respectively.

PR: 		docs/9111
Submitted by:	Josh Gilliam <josh@quick.net>

bin/expr/expr.1

@@ -28,7 +28,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\"	$Id: expr.1,v 1.6 1997/02/22 14:03:37 peter Exp $
+.\"	$Id: expr.1,v 1.7 1998/05/13 07:43:56 charnier Exp $
 .\"
 .Dd July 3, 1993
 .Dt EXPR 1
@@ -125,6 +125,9 @@ the expression is an empty string or 0.
 .It 2
 the expression is invalid.
 .El
+.Sh SEE ALSO
+.Xr sh 1 ,
+.Xr test 1
 .Sh STANDARDS
 The
 .Nm

bin/test/test.1

@@ -33,7 +33,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)test.1	8.1 (Berkeley) 5/31/93
-.\"	$Id: test.1,v 1.6 1998/05/18 06:51:56 charnier Exp $
+.\"	$Id: test.1,v 1.7 1998/09/07 16:59:05 cracauer Exp $
 .\"
 .Dd May 31, 1993
 .Dt TEST 1
@@ -253,6 +253,9 @@ missing.
 .It >1
 An error occurred.
 .El
+.Sh SEE ALSO
+.Xr expr 1 ,
+.Xr sh 1
 .Sh STANDARDS
 The
 .Nm