Fixed typos + autopep8
Fixed typos + autopep8

matthieudumont/dipy,Messaoud-Boudjada/dipy,nilgoyyou/dipy,samuelstjean/dipy,villalonreina/dipy,samuelstjean/dipy,samuelstjean/dipy,oesteban/dipy,sinkpoint/dipy,JohnGriffiths/dipy,villalonreina/dipy,rfdougherty/dipy,JohnGriffiths/dipy,matthieudumont/dipy,StongeEtienne/dipy,Messaoud-Boudjada/dipy,FrancoisRheaultUS/dipy,mdesco/dipy,StongeEtienne/dipy,rfdougherty/dipy,FrancoisRheaultUS/dipy,demianw/dipy,beni55/dipy,demianw/dipy,nilgoyyou/dipy,jyeatman/dipy,beni55/dipy,mdesco/dipy,jyeatman/dipy,sinkpoint/dipy,oesteban/dipy