missing , found by Dongsheng Song

src/lib/libc/stdlib/malloc.3

@@ -30,9 +30,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: malloc.3,v 1.88 2014/12/09 14:22:43 jmc Exp $
+.\"	$OpenBSD: malloc.3,v 1.89 2015/01/08 03:41:14 deraadt Exp $
 .\"
-.Dd $Mdocdate: December 9 2014 $
+.Dd $Mdocdate: January 8 2015 $
 .Dt MALLOC 3
 .Os
 .Sh NAME
@@ -131,7 +131,7 @@ pointer, no action occurs.
 If
 .Fa ptr
 was previously freed by
-.Fn free
+.Fn free ,
 .Fn realloc ,
 or
 .Fn reallocarray ,