added Rd documentation for replicate argument
added Rd documentation for replicate argument

nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,nimble-dev/nimble,nimble-dev/nimble,nxdao2000/nimble,NLMichaud/nimble,nimble-dev/nimble,NLMichaud/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble,nxdao2000/nimble