How to Check Front Matter for "You used dashes on the first and final line"

Please Help!

How do you do the "you used dashes on the first and final line"? I used dashes, but the bot says I did not. Can anyone help me? Thanks!

:wave: Hi CocoZhumena!

For additional context: is this in reference to a particular repository or course? If so, please share a link and I can help troubleshoot.

Thanks,
Mike