old_contents: # -*- coding: utf-8 -*-
  from django.db import models
  from django.utils.translation import ugettext_lazy as _
  from django.utils.encoding import python_2_unicode_compatible
  
  from .. import compat
  from ..utils import get_model_string
  
  
  @python_2_unicode_compatible
  class Translation(models.Model):
      """
      A Translation.
      """
      identifier = models.CharField(
          max_length=255,
          verbose_name=_('identifier'),
          help_text=_('The registered model identifier.'))
  
      locale = models.CharField(
          max_length=10,
          verbose_name=_('locale'),
          help_text=_('The locale'))
  
      column = models.CharField(
          max_length=255,
          verbose_name=_('identifier'),
          help_text=_('The identifier for the model.'))
  
      content = models.TextField(
          verbose_name=_('content'),
          null=True,
          help_text=_('The translated content.'))
  
      class Meta:
          abstract = True
          app_label = 'linguist'
          verbose_name = _('translation')
          verbose_name_plural = _('translations')
          unique_together = (('identifier', 'locale', 'column'),)
  
      def __str__(self):
          return '%s:%s (%s)' % (self.identifier, self.column, self.locale)
  
new_contents: # -*- coding: utf-8 -*-
  from django.db import models
  from django.utils.translation import ugettext_lazy as _
  from django.utils.encoding import python_2_unicode_compatible
  
  from ..utils import get_model_string
  
  
  @python_2_unicode_compatible
  class Translation(models.Model):
      """
      A Translation.
      """
      identifier = models.CharField(
          max_length=255,
          verbose_name=_('identifier'),
          help_text=_('The registered model identifier.'))
  
      locale = models.CharField(
          max_length=10,
          verbose_name=_('locale'),
          help_text=_('The locale'))
  
      column = models.CharField(
          max_length=255,
          verbose_name=_('identifier'),
          help_text=_('The identifier for the model.'))
  
      content = models.TextField(
          verbose_name=_('content'),
          null=True,
          help_text=_('The translated content.'))
  
      class Meta:
          abstract = True
          app_label = 'linguist'
          verbose_name = _('translation')
          verbose_name_plural = _('translations')
          unique_together = (('identifier', 'locale', 'column'),)
  
      def __str__(self):
          return '%s:%s (%s)' % (self.identifier, self.column, self.locale)
  
subject: Remove compat import.