I realized after the test was completed by the students that one of the 20 questions was poorly worded, resulting in most students failing it. I switched it to an indicative question, which helps those students, but I also wanted to let those who got the right answer to get a point for that. In other words, I want this question to be a "bonus" question. This does not seem to be possible:

If I use \scoring{b=0,m=0} then the question is indicative and the good answers are not counted.
If I use \scoring{b=1,m=0} then the question is counted (good for the students who got it), but a "perfect copy" would have gotten this point, and so it counts toward the "maximum total score". This is bad for the majority of students who will get zero at this question, as they can not have a perfect grade anymore (since I am using a "maximal mark").

I don't see a scoring option to change the value added to the "perfect copy" for that question. Am I missing it? If not, I would suggest adding such an option, maybe "p" for "perfect".

Note: Such a bonus question would have the effect of allowing grades above the "maximal mark"; a typical problem when grading. I would personally want to not count those points once above the maximal mark, though I suppose that some might want to.