This may sound like just cosmetics or preference, but it's making it harder to read. The check marks regularly cover up enough of a word that I have to take time to figure it out. In some cases, I CAN'T figure it out. For example, one check mark covered the first part of the month in "in XXXXy". Even after focusing, I'm still not sure if the month is "May" or "July."
So, I'm now going to try to figure out how to turn it off.