The comment should now be, "Returns the prefixes used to line comments". Both line commenting and block commenting now handle multiple line comment prefixes, since they need to, so it easier if they always receive an array, even if it is of one element as in most cases. I don't think that there could be a use to have the first comment prefix, except when there is one, but to cover all cases an array is better. I also don't think that this is used by extensions yet and is only used in brackets. But if needed I could make 2 factions for backwards compatibility.