Test failure seems to be testing error

I’m trying to complete https://www.freecodecamp.org/learn/javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals but test #2 says my output isn’t correct but on examination they seem identical.
assigned output:

[ '<li class="no-var">no-var</li>',
  '<li class="var-on-top">var-on-top</li>',
  '<li class="linebreak">linebreak</li>' ]

My console output:

[ '<li class="no-var">no-var</li>',
  '<li class="var-on-top">var-on-top</li>',
  '<li class="linebreak">linebreak</li>' ]

How do I report this bug?

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Thank you.