In the wiki history link https://www.whonix.org/w/index.php?title=KVM&action=history…
There every wiki version can be compared with every wiki version and it will show exactly what was changed (added text, removed text, edited text) as well as show which wiki account made the edit if any. Otherwise
Example wiki diff (these are easily accessible from the wiki history):
On that link…
Take special note to:
Top left, base revision to compare:
Edit by 127.0.0.1 - localhost (because the server doesn’t store IPs). = anonymous edit, no wiki account.
Top right, target revision to compare:
Contains your user name.
As for the first malicious wiki edit:
Left top side, previous version by 127.0.0.1 (no wiki account, anonymous). (That’s just the last edit that was accepted. Not necessarily an issue.)
Right top side, changed version also by 127.0.0.1.
So 100% confirmed it was a anonymous edit.