Ensure monkeypatched subprocess works again on py2
Ensure monkeypatched subprocess works again on py2

pyinvoke/invoke,kejbaly2/invoke,pfmoore/invoke,pyinvoke/invoke,tyewang/invoke,kejbaly2/invoke,mkusz/invoke,frol/invoke,pfmoore/invoke,mattrobenolt/invoke,sophacles/invoke,mkusz/invoke,mattrobenolt/invoke,singingwolfboy/invoke,frol/invoke