Update devito/ir/iet/nodes.py

Co-authored-by: Ed Caunt <[email protected]>

Author: JDBetteridge

devito/ir/iet/nodes.py

@@ -1513,7 +1513,7 @@ def __init__(self, sync_ops, body=None):
         self.sync_ops = sync_ops
 
     def __repr__(self):
-        return "<SyncSpot ({})>".format(",".join(str(i) for i in self.sync_ops))
+        return f"<SyncSpot ({','.join(str(i) for i in self.sync_ops)})>"
 
     @property
     def is_async_op(self):