def _write_mime_data(self, mw, name, value):
        # called by HTMLForm
        mw2 = mw.nextpart()
        mw2.addheader("Content-Disposition",
                      'form-data; name="%s"' % name, 1)
        f = mw2.startbody(prefix=0)
        f.write(value)
Clean the default_service field.
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/samples-and-tests/i-am-a-developer/mechanize/ClientForm.py/Control._write_mime_data--crossover with--dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/admin/forms.py/AvatarServicesForm.clean_default_service