This does not include checks/function.fish because that currently includes a "; end" in a message that indent would remove, breaking the test.
Just run `fish_indent` on the entire thing.
ip link set
ip
This is quite ugly because the syntax is ugly, the documentation both under- and overspecified at the same time (a BNF that isn't...) and it has a lot of functionality. But the completion works half-decent for `ip address`, so let's ship it.