PEP8 in test_fetcher.py
PEP8 in test_fetcher.py

FrancoisRheaultUS/dipy,nilgoyyou/dipy,villalonreina/dipy,demianw/dipy,JohnGriffiths/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy,matthieudumont/dipy,demianw/dipy,nilgoyyou/dipy,matthieudumont/dipy,StongeEtienne/dipy,JohnGriffiths/dipy,StongeEtienne/dipy