could mutation grader output indicate that mutations are taking place?

[tansaku]

at the moment, the output does not indicate that the app is being mutated under the hood, and students often miss that the failure is caused by the mutation - perhaps we could emphasize further?

[tansaku]

it does currently say thinks like:

The following required failures were not detected:
 - all ratings or checkboxes selected
with the following modifications:
 - results = [G, PG-13] movies

but they seem to get lost in the stack traces and the rest of the cucumber output ...