Update agents/s07_task_system.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: chablino

agents/s07_task_system.py

@@ -112,8 +112,8 @@ def _clear_dependency(self, completed_id: int):
 
     def list_all(self) -> str:
         tasks = []
-        files = sorted(                         
-            self.dir.glob("task_*.json"), 
+        files = sorted(
+            self.dir.glob("task_*.json"),
             key=lambda f: int(f.stem.split("_")[-1])
         )
         for f in files: