Style ignores

Signed-off-by: Kevin Eykholt <[email protected]>

Author: keykholt

art/attacks/poisoning/hidden_trigger_backdoor/hidden_trigger_backdoor_keras.py

@@ -308,8 +308,8 @@ def _get_keras_tensor(self):
                 self.estimator._layer_names  # pylint: disable=W0212
             ):
                 raise ValueError(
-                    f"Layer index {self.feature_layer} is outside of range [0 to \
-                    {len(self.estimator._layer_names) - 1}])."  # pylint: disable=W0212
+                    f"Layer index {self.feature_layer} is outside of range [0 to "
+                    f"{len(self.estimator._layer_names) - 1}])."  # pylint: disable=W0212
                 )
             layer_name = self.estimator._layer_names[self.feature_layer]  # pylint: disable=W0212
         else: