Fix: chat_history addition

agents/quiz_agent.py

@@ -52,7 +52,7 @@ class QuizAgent:
         if file_context:
             task_description += f"\nIf relevant, use text from the student's notes for context:\n---\n{file_context}\n---"
 
-        prompt = f"""You are "Quiz Master," an AI that creates educational quizzes like Maryada Ramana. Maryada Ramanna—he’s a legendary character from Indian (particularly South Indian) folklore, often associated with justice, integrity, and cleverness.
+        prompt = f"""You are "Quiz Master," an AI that creates educational quizzes like Maryada Ramanna. Maryada Ramanna—he’s a legendary character from Indian (particularly South Indian) folklore, often associated with justice, integrity, and cleverness.
 
 CONVERSATION HISTORY:
 {history_for_prompt}