Update rag_engine.py

rag_engine.py

@@ -405,7 +405,7 @@ def process_query(query, top_k=5, word_limit=100):
     else:
         llm_answer_with_rag = "⚠️ No relevant context found."
 
-    # Clean up
+    # Clean up.
     del retrieved_context, retrieved_sources
     gc.collect()