DOC Update note on code contribution: use issue tracker not mailing list
@@ -169,10 +169,13 @@ Contributing code
.. note::
- To avoid duplicating work, it is highly advised that you contact the
- developers on the mailing list before starting work on a non-trivial feature.
-
- https://mail.python.org/mailman/listinfo/scikit-learn
+ To avoid duplicating work, it is highly advised that you search through the
+ `issue tracker <https://github.com/scikit-learn/scikit-learn/issues>`_ and
+ the `PR list <https://github.com/scikit-learn/scikit-learn/pulls>`_.
+ If in doubt about duplicated work, or if you want to work on a non-trivial
+ feature, it's recommended to first open an issue in
+ the `issue tracker <https://github.com/scikit-learn/scikit-learn/issues>`_
+ to get some feedbacks from core developers.
How to contribute
-----------------
