eliminar atributo style del editor

app/models/metadata_content.rb

@@ -72,6 +72,17 @@ class MetadataContent < MetadataTemplate
       resource['controls'] = true
     end
 
+    # Elimina los estilos salvo los que asigne el editor
+    html.css('*').each do |element|
+      next if elements_with_style.include? element.name.downcase
+
+      element.remove_attribute('style')
+    end
+
     html.to_s.html_safe
   end
+
+  def elements_with_style
+    @elements_with_style ||= %w[div mark].freeze
+  end
 end