DOC replace 'maximize' by 'minimize' in gpr.py
@@ -63,7 +63,7 @@ class GaussianProcessRegressor(BaseEstimator, RegressorMixin):
must have the signature::
def optimizer(obj_func, initial_theta, bounds):
- # * 'obj_func' is the objective function to be maximized, which
+ # * 'obj_func' is the objective function to be minimized, which
# takes the hyperparameters theta as parameter and an
# optional flag eval_gradient, which determines if the
# gradient is returned additionally to the function value
