fixed syntax for samplers Rd documentation
fixed syntax for samplers Rd documentation

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