diff --git a/agents/s07_task_system.py b/agents/s07_task_system.py
index 9f57661..8b4e7ac 100644
--- a/agents/s07_task_system.py
+++ b/agents/s07_task_system.py
@@ -112,8 +112,8 @@ class TaskManager:
 
     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: