Update chatbot_rag.py

chatbot_rag.py

@@ -95,7 +95,9 @@ def build_qa():
 
     # 6. Helper functions
     def format_docs(docs):
-        return "\n".join(doc.page_content for doc in docs)
+        # ✅ skip any docs where page_content is None
+        return "\n".join(d.page_content for d in docs if d.page_content)
+
 
     def hf_to_str(x):
         """Convert Hugging Face pipeline output to clean plain text."""