py3: use print_function in hypothesishelpers.py

tests/hypothesishelpers.py

@@ -4,7 +4,7 b''
 #
 # For details see http://hypothesis.readthedocs.org
 
-from __future__ import absolute_import
+from __future__ import absolute_import, print_function
 import os
 import sys
 import traceback

tests/test-check-py3-compat.t

@@ -41,7 +41,6 b''
   i18n/polib.py not using absolute_import
   setup.py not using absolute_import
   tests/heredoctest.py requires print_function
-  tests/hypothesishelpers.py requires print_function
   tests/killdaemons.py not using absolute_import
   tests/md5sum.py not using absolute_import
   tests/mockblackbox.py not using absolute_import