don't explain if it is the comment that was on it that is hide.

Which other interpretation would come to your mind? (Just asking for clarification here, to make sure to understand this request correctly.)

For example, "Another comment is hidden (history)".
Thanks

The idea is not to mention the username? It may be useful to see the username: you will not take the same action if a comment has been hidden by a trusted community member or a Single-purpose account.

If you want, but actually the message is short and clear, please keep this :)

Yes, the placement and wording of hidden comments make it unclear what exactly was hidden. It'd be much more informative to have full information displayed - the name of a user which comment was hidden and a user name who hid it. Something like the screenshot below (the screenshot is from history accessible by any user).

'View history' allows all users to easily see all hidden comments - there is no need to not display a username of a user who hid the comment.

Have a better way to show where was the hidden comment is a Design issue.