rustfmt is available via apt-get in 22.04, use that instead of tarball that's no longer available
brittany now installs cleanly in the default haskell ghc/cabal in 22.04, so just use that
perltidy in 22.04 has slightly different output
nixfmt download url changed (now includes OS/arch). There was initially no binary available when nixfmt was updated,
but the devs there were kind enough to provide one: https://github.com/serokell/nixfmt/issues/139
This runs a full make fmt-build without errors, though it takes a while ;). All tests pass, too.
This also fixes a few test installers:
This runs a full
make fmt-buildwithout errors, though it takes a while ;). All tests pass, too.