Document the fact that expr is POSIX.2 compliant.

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 1.3 1993/08/16 23:22:49 jtc Exp $
+.\"	$Id: expr.1,v 1.4 1993/08/28 04:21:00 jtc Exp $
 .\"
 .Dd July 3, 1993
 .Dt EXPR 1
@@ -128,7 +128,5 @@ the expression is invalid.
 .Sh STANDARDS
 The
 .Nm expr
-utility
-is expected to be 
-.St -p1003.2
-compatible.
+utility conforms to
+.St -p1003.2 .