Update what's new

Author: arjoly

doc/whats_new.rst

@@ -9,9 +9,9 @@ Changelog
 ---------
 
    - Added :class:`ensemble.BaggingClassifier` and
-     :class:`ensemble.BaggingRegressor` meta-estimators for ensembling 
-     any kind of base estimator. See the :ref:`Bagging <bagging>` section of 
-     the user guide for details and examples. By Gilles Louppe`_. 
+     :class:`ensemble.BaggingRegressor` meta-estimators for ensembling
+     any kind of base estimator. See the :ref:`Bagging <bagging>` section of
+     the user guide for details and examples. By Gilles Louppe`_.
 
    - Added predict method to :class:`cluster.AffinityPropagation` and
      :class:`cluster.MeanShift`, by `Mathieu Blondel`_.
@@ -36,6 +36,9 @@ Changelog
      significantly speedup computation by `Denis Engemann`_, and
      `Alexandre Gramfort`_.
 
+   - Memory improvements of extra trees and random forest by
+     `Arnaud Joly`_.
+
 
 API changes summary
 -------------------