Changed list to tuple

heq_task.py

@@ -8,6 +8,7 @@ import numpy as np
 from lighteval.tasks.requests import Doc
 from Levenshtein import distance
 import collections
+from lighteval.utils import as_list
 
 def get_tokens(s):
     if not s:
@@ -110,4 +111,5 @@ heq_task = LightevalTaskConfig(
     evaluation_splits=["heq"],
     metric=['heq_tlnls_metric'],
     stop_sequence=['\n']
-)
+)
+heq_task.stop_sequence = as_list(heq_task.stop_sequence)