Same question, this is not the first time I’ve seen random 's.

I think it’s a bot, look at the post history with the weird repetitive hyphens.

The account is strange, two years old account with barely any comment for two years then a lot of comments in the last 3 days. The 3 first comments of the account capitalise the first letter, everything is lowercase in the last 3 days. He never replies to comments under his own comment. Sadly, a comment of someone who was telling it was a bot account has been flagged ...