add forgotten test for r67030

Lib/test/test_future5.py

+# Check that multiple features can be enabled.
+from __future__ import unicode_literals, print_function
+
+import sys
+import unittest
+from . import test_support
+
+
+class TestMultipleFeatures(unittest.TestCase):
+
+    def test_unicode_literals(self):
+        self.assertTrue(isinstance("", unicode))
+
+    def test_print_function(self):
+        with test_support.captured_output("stderr") as s:
+            print("foo", file=sys.stderr)
+        self.assertEqual(s.getvalue(), "foo\n")
+
+
+def test_main():
+    test_support.run_unittest(TestMultipleFeatures)