new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  
  from django.db import models, migrations
  
  
  class Migration(migrations.Migration):
  
      dependencies = [
          ('aldryn_style', '0001_initial'),
      ]
  
      operations = [
          migrations.AlterField(
              model_name='style',
              name='class_name',
              field=models.CharField(default=b'container', max_length=50, verbose_name='class name', blank=True, choices=[(b'container', 'bootstrap container')]),
              preserve_default=True,
          ),
      ]
  
subject: add missing migration