This was my attempt at migrating from diff-so-fancy to delta. Although
having an easy-to-hack-on rust code base was certainly appealing, there
are some minor inconveniences such as longer diffs by default.
The previous commit didn't actually work, and I shouldn't need to
change the variables often, so it's much simpler to not have them.
In the event that I do need to change something, rg and sd should get
the job done well.
