Tweak to test_send_file() in test_httplib.py
Tweak to test_send_file() in test_httplib.py

Fixes a Py2 UnicodeError

krischer/python-future,michaelpacer/python-future,QuLogic/python-future,krischer/python-future,michaelpacer/python-future,QuLogic/python-future,PythonCharmers/python-future,PythonCharmers/python-future