diff --git a/data.py b/data.py
index ec0715154fbf2aea018a0d4bc33357884f962e45..e55eed45ba3fa82dd35e1fe75fbde24d77c64e77 100644
--- a/data.py
+++ b/data.py
@@ -42,7 +42,7 @@ class Run:
         if len(self.args):
             x += "("
             for arg in self.args[:-1]:
-                x += "{arg}, "
+                x += f"{arg}, "
             x += f"{self.args[-1]})"
         return x