I've tracked this back to e223366 and it looks like this just forces KiB
because back then humanize_size didn't exist, but the size was just
divided by 1024 to keep it somewhat readable. When humanize_size got
introduced in 3c8a448 this was just carried over.
The unit detected for "Download Size" is reused for "Installed Size" to
make it easier to read.
Signed-off-by: Florian Pritz <bluewind@xinu.at>
Signed-off-by: Allan McRae <allan@archlinux.org>