[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/label_smoothing.py

@@ -175,4 +175,4 @@ def cross_entropy_loss(
     print("\nCross-entropy loss with smoothed target vs confident prediction:")
     smoothed = smoother.smooth(2)
     confident_pred = np.array([0.01, 0.01, 0.96, 0.01, 0.01])
-    print(f"  Loss = {cross_entropy_loss(smoothed, confident_pred):.4f}")
+    print(f"  Loss = {cross_entropy_loss(smoothed, confident_pred):.4f}")