fix format

Author: SvenKlaassen

doubleml/double_ml.py

@@ -1010,7 +1010,7 @@ def _initialize_boot_arrays(self, n_rep_boot):
     def _initialize_predictions_and_targets(self):
         self._predictions = {learner: np.full((self._dml_data.n_obs, self.n_rep, self._dml_data.n_coefs), np.nan)
                              for learner in self.params_names}
-        self._nuisance_targets = {learner: np.full((self._dml_data.n_obs, self.n_rep, self._dml_data.n_coefs), np.nan) 
+        self._nuisance_targets = {learner: np.full((self._dml_data.n_obs, self.n_rep, self._dml_data.n_coefs), np.nan)
                                   for learner in self.params_names}
 
     def _initialize_rmses(self):