anchor.diff:          <div class="input-group">
             <%= f.submit :Guardar, class: "crear_nuevo", data: {disable_with: "Almacenando"}%>
           </div>
  -        <% end %>
         </div>
       </div>
     </div>
   </div>
  +<% end %>
  
positive.code: <div class="row">
    <div class="col-md-4 col-md-offset-4">
      <div class="panel panel-default">
        <div class="panel-body">
          <h3 class= "text-center">Crear Usuarios</h3>
          <%= nested_form_for @user do |f| %>
          <%= f.fields_for :cliente do |cliente_params| %>
          <%=  cliente_params.text_field :nombre, class: "form-control", :placeholder => "Nombres Apellidos" %>
          <br>
  
negative.code:         <%= f.text_field :username, :placeholder => "Nombre de Usuario", class: "form-control" %>
          <br>
          <%= f.hidden_field :rol %>
          <%= f.select :rol, Rol.all.map { |rol| rol.nombre  },{ :prompt => "Seleccione Rol"}, {class: "form-control"}%>
          <br>
          <%= f.password_field :password, :placeholder => "Clave", class: "form-control" %>
          <br>
  