fix?: context parsing

app.py

@@ -98,7 +98,7 @@ def update_state(history: HistoryType, message: Optional[Dict[str, str]]):
                 history.append(
                     {
                         "role": "assistant",
-                        "content": [" ".join(doc_context)][
+                        "content": " ".join(doc_context)[
                             : pipe.model.config.max_position_embeddings
                         ],
                     }