Update app.py

app.py

@@ -4,7 +4,7 @@ from langchain.memory import ConversationBufferMemory
 from langchain.memory import ConversationTokenBufferMemory
 from langchain.llms import HuggingFacePipeline
 # from langchain import PromptTemplate
-from langchain.prompts import PromptTemplate 
+from langchain.prompts import PromptTemplate
 from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler