Update app.py

app.py

@@ -67,9 +67,10 @@ rag_chain = (
     | StrOutputParser()
 )
 
+
 import gradio as gr
 
-# Mock for `rag_chain.stream` or similar streaming function
+# Mock for rag_chain.stream or similar streaming function
 class MockRAGChain:
     @staticmethod
     def stream(message):
@@ -114,5 +115,4 @@ with gr.Blocks(theme=custom_theme) as demo:
 
 # Launch the app
 if __name__ == "__main__":
-    demo.launch()
-
+    demo.launch()