Fix errors detected by Ruff (#3918)

### What problem does this PR solve?

Fix errors detected by Ruff

### Type of change

- [x] Refactoring

agent/component/rewrite.py

@@ -95,7 +95,8 @@ class RewriteQuestion(Generate, ABC):
         hist = self._canvas.get_history(4)
         conv = []
         for m in hist:
-            if m["role"] not in ["user", "assistant"]: continue
+            if m["role"] not in ["user", "assistant"]:
+                continue
             conv.append("{}: {}".format(m["role"].upper(), m["content"]))
         conv = "\n".join(conv)