code review from Josh and Robert

@@ -13,11 +13,11 @@
 .\"
 .Dd Jan 18, 2017
 .Dt VMEM_CONTAINS 9F
 .Os
 .Sh NAME
-.Nm vmem_contains ,
+.Nm vmem_contains
 .Nd check for membership in a vmem arena
 .Sh SYNOPSIS
 .In sys/vmem.h
 .Ft int
 .Fo vmem_contains