anchor.diff:  
   <div class="row">
     <div class="col-sm-12">
  +    <h3>Select Film</h3>
  +  </div>
  +
  +  <div class="col-sm-6">
  +    <%= form_for @film, method: :put, html: { class: 'form-horizontal', role: 'form' } do |f| -%>
  +      <div class="form-group">
  +        <div class="col-sm-9">
  +          <%= f.select :tmdb_identifier, options_from_collection_for_select(@film.tmdb_possibles.map { |n| ExternalFilm.new(n) }, :tmdb_id, :title_and_year), {}, class: 'form-control input-sm' %>
  +        </div>
  +        <div class="col-sm-3">
  +          <%= button_tag 'Choose', class: 'btn btn-primary btn-sm' %>
  +        </div>
  +      </div>
  +    <% end %>
  +  </div>
  +  <div class="col-sm-2">
  +    <%= form_for @film, method: :put, html: { class: 'form-inline', role: 'form' } do |f| -%>
  +      <div class="form-group">
  +        <%= f.hidden_field :hidden, value: true %>
  +        <%= button_tag 'Hide', class: 'btn btn-danger btn-sm' %>
  +      </div>
  +    <% end %>
  +  </div>
  +  <div class="col-sm-2">
  +    <%= form_for @film, method: :put, html: { class: 'form-inline', role: 'form' } do |f| -%>
  +      <div class="form-group">
  +        <%= f.hidden_field :event, value: true %>
  +        <%= f.hidden_field :information_added, value: true %>
  +        <%= button_tag 'Event', class: 'btn btn-warning btn-sm' %>
  +      </div>
  +    <% end %>
  +  </div>
  +  <div class="col-sm-2">
  +    <%= form_for @film, method: :put, html: { class: 'form-inline', role: 'form' } do |f| -%>
  +      <div class="form-group">
  +        <%= f.hidden_field :information_added, value: true %>
  +        <%= button_tag 'No information', class: 'btn btn-warning btn-sm' %>
  +      </div>
  +    <% end %>
  +  </div>
  +</div>
  +
  +<div class="row">
  +  <div class="col-sm-12">
       <h3>Merge with...</h3>
     </div>
   
  
positive.code:       <div class="form-group">
          <%= f.label :name %>
          <%= f.text_field :name, class: 'form-control' %>
        </div>
        <div class="form-group">
          <%= f.label :tagline %>
  
negative.code:   Edit <small><%= @film.name %></small>
  <% end -%>
  
  <div class="row">
    <div class="col-sm-12">
      <h2>Film Details</h2>
  