Catching bugs in scikit-learn [D]

sklearn 1.9 fixed a bug in how BayesianRidge computes its uncertainty. We traced predict on 1.8 and 1.9 and compared the two formulas it actually computes, see if you can spot what changed before the notebook tells you. github.com/aadya940/scikit-verify/blob/master/examples/sklearn_bug_hunting.ipynb