old_contents: from django import template
  from django.conf import settings
  
  register = template.Library()
  
  
  @register.filter
  def called_same(qs, name):
      return [item for item in qs if item.name==name]
  
new_contents: from django import template
  from django.conf import settings
  
  register = template.Library()
  
  
  @register.filter
  def called(qs, name):
      return [item for item in qs if item.name==name]
  
subject: Rename template tag.