old_contents: # -*- coding: utf-8 -*-
  from distutils.version import LooseVersion
  
  import django
  from django.template import Library
  
  
  register = Library()
  
  
  def filer_actions(context):
      """
      Track the number of times the action field has been rendered on the page,
      so we know which value to use.
      """
      context['action_index'] = context.get('action_index', -1) + 1
      return context
  filer_actions = register.inclusion_tag("admin/filer/actions.html", takes_context=True)(filer_actions)
  
  
  @register.inclusion_tag('admin/filer/widgets/lookup.html', takes_context=True)
  def render_filer_lookup_button(context):
      version = LooseVersion(django.get_version())
      is_18_and_up = version >= LooseVersion('1.8')
      context['IS_DJANGO_18'] = is_18_and_up and  version < LooseVersion('1.9')
      return context
  
new_contents: # -*- coding: utf-8 -*-
  from distutils.version import LooseVersion
  
  import django
  from django.template import Library
  
  
  register = Library()
  
  
  def filer_actions(context):
      """
      Track the number of times the action field has been rendered on the page,
      so we know which value to use.
      """
      context['action_index'] = context.get('action_index', -1) + 1
      return context
  filer_actions = register.inclusion_tag("admin/filer/actions.html", takes_context=True)(filer_actions)
  
  
  @register.inclusion_tag('admin/filer/widgets/lookup.html', takes_context=True)
  def render_filer_lookup_button(context):
      version = LooseVersion(django.get_version())
      is_18_and_up = version >= LooseVersion('1.8')
      context['IS_DJANGO_18'] = is_18_and_up and version < LooseVersion('1.9')
      return context
  
subject: Fix minor PEP8 issue