Update app.py

app.py

@@ -577,12 +577,10 @@ class GEOSEOApp:
             tmp_file.write(uploaded_file.read())
             return tmp_file.name
 
-
-
 def main():
     """Main entry point"""
     if "rag_chain" not in st.session_state:
-    st.session_state.rag_chain = None
+        st.session_state.rag_chain = None
 
     app = GEOSEOApp()
     app.run()