DOC minor change in documentation multi -> multiple b-values
DOC minor change in documentation multi -> multiple b-values

matthieudumont/dipy,nilgoyyou/dipy,villalonreina/dipy,matthieudumont/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy,FrancoisRheaultUS/dipy,villalonreina/dipy