Fixed a PendingDeprecationWarning in template_tests.

Author: aaugustin

tests/template_tests/tests.py

@@ -444,7 +444,7 @@ def gen():
  def test_ifchanged_render_once(self):
  """ Test for ticket #19890. The content of ifchanged template tag was
  rendered twice."""
- template = Template('{% ifchanged %}{% cycle "1st time" "2nd time" %}{% endifchanged %}')
+ template = Template('{% load cycle from future %}{% ifchanged %}{% cycle "1st time" "2nd time" %}{% endifchanged %}')
  output = template.render(Context({}))
  self.assertEqual(output, '1st time')