redmine/app/views/groups/new_users.html.erb

<h2><%= l(:label_user_new) %></h2>

<%= form_for(@group, :url => group_users_path(@group), :method => :post) do |f| %>
  <%= render :partial => 'new_users_form' %>
  <p><%= submit_tag l(:button_add) %></p>
<% end %>