[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

machine_learning/loss_functions.py

@@ -750,6 +750,8 @@ def log_cosh_loss(y_true: np.ndarray, y_pred: np.ndarray) -> float:
     # Alternatively, use stable version:
     loss = np.logaddexp(errors, -errors) - np.log(2)
     return np.mean(loss)
+
+
 if __name__ == "__main__":
     import doctest