Why do you think it's broken ? I've been using this format for years. 
I have no issues with the format... like I said, it was the message that is broken. This doesn't look "broken" to you?
Quote
This is an exI confirm that I am the owner of this address username - punky. examplens from Bitcointalk, u=1695037 26.june 2019 ample of a signed message.
It's quite obvious that it originally said something like:
Quote
This is an example of a signed message
But for some reason, now has "I confirm that I am the owner of this address username - punky. examplens from Bitcointalk, u=1695037 26.june 2019" typed into the middle of it... to make matters worse, this version also has the other username "examplens" in there as well.
I'm just wondering why someone would choose to copy/paste such a broken message and edit it... rather than simply typing their own or using one of the many "correct" examples of signed messages from this thread?
Especially when that message was from over a week ago, and there have been plenty of other posts staking addresses since.