anchor.diff: -<div>
  +<%= nested_form_for @factura do |f| %>
   <div class="col-md-7">
   	<h6 class="text-muted text-right fecha"></h6>
   	<!-- formulario datos del cliente -->
  -	<%= nested_form_for @factura do |f| %>
   	<% if @factura.errors.any? %>
   	<h2>Errores:</h2>	
   	<ul>
  
positive.code: 			</table>
  			<br>
  			<%= f.submit :Guardar, class: "guardar_submit btn-block", data: {disable_with: "Almacenando"}%>
  			<% end %>
  		</div>
  	</div>
  </div>
  </div>
negative.code: 		</table>
  	</div>
  </div>
  <!-- datos de impuestos factura -->
  <div class="col-md-2 col-md-offset-1">
  	<div class="panel panel-default">
  		<div class="panel-heading">
  			<h3 class="panel-title">IMPUESTOS %</h3>
  		</div>
  		<div class="panel-body">
  			<table>
  				<thead>
  					<th></th>
  