fix default open mode for test.write() to be wb.. it was changed to just w when six was the plan. it causes many tests to fail on win32
fix default open mode for test.write() to be wb.. it was changed to just w when six was the plan. it causes many tests to fail on win32

timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons,timj/scons