code review from Josh and Robert

*** 13,23 ****
  .\"
  .Dd Jan 18, 2017
  .Dt VMEM_CONTAINS 9F
  .Os
  .Sh NAME
! .Nm vmem_contains ,
  .Nd check for membership in a vmem arena
  .Sh SYNOPSIS
  .In sys/vmem.h
  .Ft int
  .Fo vmem_contains
--- 13,23 ----
  .\"
  .Dd Jan 18, 2017
  .Dt VMEM_CONTAINS 9F
  .Os
  .Sh NAME
! .Nm vmem_contains
  .Nd check for membership in a vmem arena
  .Sh SYNOPSIS
  .In sys/vmem.h
  .Ft int
  .Fo vmem_contains