In the CC-BY-ND human readable summary, there is the sentence
Attribution — You must give appropriate credit, provide a link to the license , and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
I assume they want to express that it has to be indicated that changes to the license must be indicated. For me, when first reading the license, it seemed that I have to indicate whether or not I made changes to the product, which is a bit confusing, because ND means that you're not allowed to make changes.
Does the comma make the difference in this case?