Folding Classifier don't correctly work with mask in report.learning_curve

[tlikhomanenko]

1. Add message about dataset length (equal or not to the training) during staged_predict_proba
2. Add predict_all (True, False) to report learning curve (when mask will be applied, before or after prediction operation)

[arogozhnikov]

1. Add message about dataset length (equal or not to the training) during staged_predict_proba

Resolved, there message now is predicting with random estimator if using folding scheme and train length doesn't coincide with test.
9dd8eee

[arogozhnikov]

Resolved in
5b68483

Now there is special parameter predict_only_masked=True