new_contents: # coding: utf-8
  from __future__ import absolute_import
  
  from ..tools.encoding import smart_unicode
  from pytils.translit import translify
  import re
  
  RE_NOT_ENCHAR = re.compile(ur'[^-a-zA-Z0-9]', re.U)
  RE_NOT_ENRUCHAR = re.compile(ur'[^-a-zA-Zа-яА-ЯёЁ0-9]', re.U)
  RE_RUSSIAN_CHAR = re.compile(ur'[а-яА-ЯёЁ]', re.U)
  RE_DASH = re.compile(r'-+')
  
  def slugify(value, limit=None, default=''):
      value = smart_unicode(value)
  
      # Replace all non russian/english chars with "-" char
      # to help pytils not to crash
      value = RE_NOT_ENRUCHAR.sub('-', value)
  
      # Do transliteration
      value = translify(value)
  
      # Replace trash with safe "-" char
      value = RE_NOT_ENCHAR.sub('-', value).strip('-').lower()
  
      # Replace sequences of dashes
      value = RE_DASH.sub('-', value)
  
      if limit is not None:
          value = value[:limit]
  
      if value != "":
          return value
      else:
          return default
  
subject: Add tools.russian module with slugify function which can handle properly russian strings