Small corrections

app.py

@@ -58,7 +58,7 @@ indexing.run({"sources": ["knowledge-plain.txt"]})
 ##################################
 
 no_answer_message = (
-    "I'm not allowed to answer this questions. Please ask something related to "
+    "I'm not allowed to answer this question. Please ask something related to "
     "APIs access in accordance DSA’s transparency and data-sharing provisions. "
     "Is there anything else I can do for you? "
 )
@@ -167,7 +167,7 @@ def chat(message, history):
     """
     Chat function for Gradio. Uses the pipeline to produce next answer.
     """
-    conv_history = "\n\n".join([f"{message["role"]}: {message["content"]}" for message in history[-2:]])
+    conv_history = "\n\n".join([f"{message['role']}: {message['content']}" for message in history[-2:]])
     user_history = [message for message in history if message["role"] == "user"]
     results = answer_query.run({"user_history": user_history, "query": message,
                                 "conv_history": conv_history})
@@ -180,4 +180,4 @@ def chat(message, history):
     return answer
 
 if __name__ == "__main__":
-    gr.ChatInterface(chat, type="messages").launch()
+    gr.ChatInterface(chat, type="messages").launch()