userlist <%= @name %>
<%- Array(@groups).each do |group| -%>
  <%- if group and ! group.empty? -%>
  group <%= group %>
  <%- end -%>
<%- end -%>
<%- Array(@users).each do |user| -%>
  <%- if user and ! user.empty? -%>
  user <%= user %>
  <%- end -%>
<%- end -%>