I see the problem that when just looking to the Operators column, you see + and - and expect you know what's meant. (Everybody knows + and -!) Only a look for Additional Information brings you to understand, that not + -, but "Unary + -" is meant.
I think this basic info belongs to the Operator column, to make it's info unique. "Additional Info" should be just additional
explanation, and not be neccessary
to interpret the meaning of the operators.
Sorry - just my interpretation.
(Why? Because it happened to me