Update app.py

app.py

@@ -42,7 +42,7 @@ def get_conversation_chain(vectorstore):
     # llm = HuggingFaceHub(repo_id="NousResearch/Llama-2-7b-hf", model_kwargs={"temperature":0.5, "max_length":512})
 
     memory = ConversationBufferMemory(
-        memory_key='chat_history', return_messages=True)
+                memory_key='chat_history', return_messages=True)
     conversation_chain = ConversationalRetrievalChain.from_llm(
         llm=llm,
         retriever=vectorstore.as_retriever(),