My answer would be - I write notes expecting a total stranger who doesn’t know me to read it in five years time. I need to be clear to someone in the future that I did know what I was doing at the time. And they can trust my edit as genuine. I want to give them a good feeling that I actually checked my resources and know what I am talking about. I don’t want to them to think I just Google’d it, or stuffed a date in as I wanted a tag filled in.
I’d also try and make the comment readable and not just shorthand. A large number of the users will not have English as a first language meaning some details get lost.
With the example you have posted I don’t know an answer. My first is a question as you are changing two separate people into one entity which seems weird to me. So that becomes the answer… why are you making a single entity out of two separate people?
So that comes down to a edit note of “These two artists perform as a duo”.
Your note is close, but the meaning is a bit vague as it can be misread. I’d waffle it out a bit more into a clear English sentence.