Update rag_engine.py

rag_engine.py

@@ -380,7 +380,7 @@ def process_query(query, top_k=5, word_limit=100):
         top_k=top_k
     )
     
-    # Format citations.
+    # Format citations
     sources = format_citations(retrieved_sources) if retrieved_sources else "No citation available."
 
     # Generate answer