If you follow the directions in that file then git blame will ignore the
listed commits. A commit should only go in that file if its only changes
were to formatting, particularly on a large part of the codebase (like a
change to .clang-format getting applied to the repo.)
Cribbed from here:
https://www.stefanjudis.com/today-i-learned/how-to-exclude-commits-from-git-blame/
