Final refactoring

app.py

@@ -37,7 +37,7 @@ def get_answer(question: str) -> Dict[str, Any]:
         }
 
 def format_results(results: List[Tuple[str, str]]) -> str:
-    output = ""
+    output = ''
     for i, (question, answer) in enumerate(results):
         output += f'Question №{i+1}: {question}\n'
         output += f'Answer: {answer}\n'