Fix formatting

Author: lpozo

python-flatten-list/flatten_numpy_flatten.py

@@ -1,11 +1,12 @@
 import numpy as np
 
 matrix = np.array(
-[
-    [9, 3, 8, 3],
-    [4, 5, 2, 8],
-    [6, 4, 3, 1],
-    [1, 0, 4, 5],
-])
+    [
+        [9, 3, 8, 3],
+        [4, 5, 2, 8],
+        [6, 4, 3, 1],
+        [1, 0, 4, 5],
+    ]
+)
 
 matrix.flatten()