Update documentation

docs/code_snippets/testing/di_handler_unittest.py

@@ -11,18 +11,20 @@ from argenta.di.integration import setup_dishka, FromDishka
 class Service:
     def hello(self) -> str:
         return "world"
-        
+
+
 def get_service() -> Service:
     return Service()
-        
+
 
 router = Router(title="DI")
 
+
 @router.command("HELLO")
 def hello(response: Response, service: FromDishka[Service]) -> None:
     print(f"hello {service.hello()}")
-    
-    
+
+
 class _FakeApp:
     # Minimal stub for setup_dishka; app object is not used in unit tests
     registered_routers = [router]
@@ -31,12 +33,12 @@ class _FakeApp:
 def test_hello_uses_service():
     provider = Provider(scope=Scope.APP)
     provider.provide(get_service)
-    
+
     container = make_container(provider)
     setup_dishka(app=_FakeApp(), container=container, auto_inject=True)
 
     # Call handler
     with redirect_stdout(io.StringIO()) as stdout:
-        router.finds_appropriate_handler(InputCommand.parse('HELLO'))
+        router.finds_appropriate_handler(InputCommand.parse("HELLO"))
 
     assert "hello world" in stdout.getvalue()