DOC Fixed typo in contributors guide
@@ -388,7 +388,7 @@ Checkout the official joblib documentation:
.. _warm-restarts:
-A sample algorithmic trick: warm restarts
-==============================================================
+A simple algorithmic trick: warm restarts
+=========================================
See the glossary entry for `warm_start <http://scikit-learn.org/dev/glossary.html#term-warm-start>`_
