fix test client fixture

Author: codewitching

tests/test_api.py

@@ -1,4 +1,4 @@
-import pytest 
+import pytest
 from app import create_app
 
 @pytest.fixture
@@ -11,5 +11,3 @@ def test_divide_endpoint(client):
     response = client.get("/divide")
     assert response.status_code == 200
     assert response.json["result"] == 5
-
-