anchor.diff:  
       <%= select_tag(context.input_name(:option_node_id),
             options_from_collection_for_select(answer.first_level_option_nodes,
  -          'id', 'option_name', answer.option_node_id),
  +          "id", "option_name", answer.option_node_id),
             include_blank: true,
  -          class: 'form-control') %>
  +          class: "form-control") %>
   
     <% when "select_multiple" %>
   
  
positive.code: <%# show the error messages without keys %>
  <%= content_tag(:div, answer.errors.to_hash.values.join(', '), class: 'form-errors') unless answer.errors.empty? %>
  
  <div class="widget">
    <% case type = answer.qtype.name
  
negative.code: 
      <%= text_field_tag(context.input_name(:value), answer.value, class: "qtype_#{type} form-control") %>
  
      <% if type == "location" %>
        &nbsp;<%= action_link("edit", "#", class: "edit_location_link") if form_mode != :show %>
      <% end %>
  
  