style: format code with Black, isort and Prettier (#18)

This commit fixes the style issues introduced in 4e722fc according to
the output
from Black, isort and Prettier.

Details: None

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>

tests/examples/test_sample.py

@@ -1,6 +1,5 @@
-import pytest
-
 import numpy as np
+import pytest
 from numpy.testing import assert_allclose, assert_array_equal
 
 from template.examples.sample import add, divide, make_array