MAINT blackify plot_stack_predictors example (#24944)
MAINT blackify plot_stack_predictors example (#24944)


scikit-learn/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn,scikit-learn/scikit-learn,betatim/scikit-learn,scikit-learn/scikit-learn