First character hash (#) erased whether it's there or not
If you want to submit students from a file containing student numbers, emails, names etc extracted from brightspace, you find that the first character of the stud id is a hash. If you see that, you may be tempted to erase these hashes. However, zesje also does this for you, without checking whether the hashes are there or not. If they aren't, you lose the training digit of the student number.