<<<
--- django/views/debug.py
+++ django/views/debug.py
@@ -78,6 +78,10 @@
         cleansed = self.cleansed_substitute
     elif isinstance(value, dict):
         cleansed = {k: self.cleanse_setting(k, v) for k, v in value.items()}
+    elif isinstance(value, (list, tuple, set)) and not isinstance(value, str):
+        cleansed = []
+        for item in value:
+            cleansed.append(self.cleanse_setting(key, item))
     else:
         cleansed = value
 except TypeError:
>>>