Error on javascript-algorithms-and-data-structures challenge

How to report an error on javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand?

The (small) error is that we must change the code outside the allowed lines.

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Common misunderstanding. You do not need to convert from an explicit to an implicit return. The comments are fine, but you may safely ignore them and convert to an implicit return.