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32964.Fix

doc/whats_new/upcoming_changes/sklearn.gaussian_process/32964.fix.rst

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  • The hyperparameters of the default kernel of :class:~sklearn.gaussian_process.GaussianProcessRegressor, namely ConstantKernel() * RBF(), are now optimized when optimizer is not None. Thus, gpr = GaussianProcessRegressor().fit(X, y) uses optimized kernel hyperparameters. By :user:Matthias De Lozzo <mdelozzo>.