new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  import djangocms_text_ckeditor.fields
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('djangocms_blog', '0005_auto_20150212_1118'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='posttranslation',
              name='abstract',
              field=djangocms_text_ckeditor.fields.HTMLField(verbose_name='Abstract', blank=True, default=''),
              preserve_default=True,
          ),
      ]
  
subject: add migration for optional abstract