added tree of type "regressor" to the docstring of exportviz
@@ -92,7 +92,7 @@ def export_graphviz(decision_tree, out_file=SENTINEL, max_depth=None,
Parameters
----------
- decision_tree : decision tree classifier
+ decision_tree : decision tree regressor or classifier
The decision tree to be exported to GraphViz.
out_file : file object or string, optional (default='tree.dot')
