DOC fix typo in estimator documentation
@@ -1125,7 +1125,7 @@ the correct interface more easily.
.. topic:: ``BaseEstimator`` and mixins:
- We tend to use use "duck typing", so building an estimator which follows
+ We tend to use "duck typing", so building an estimator which follows
the API suffices for compatibility, without needing to inherit from or
even import any scikit-learn classes.
