Revert "DOC Remove outdated doc in KBinsDiscretizer"

Xing · Xing · commit 81657992d429 · 2019-04-28T15:16:38.000-04:00
This reverts commit 9d8b3f8.
diff --git a/sklearn/preprocessing/_discretization.py b/sklearn/preprocessing/_discretization.py
@@ -191,6 +191,8 @@ def fit(self, X, y=None):
 
     def _validate_n_bins(self, n_features):
         """Returns n_bins_, the number of bins per feature.
+
+        Also ensures that ignored bins are zero.
         """
         orig_bins = self.n_bins
         if isinstance(orig_bins, numbers.Number):
