After a couple of preliminary patches, a run of:
  gofmt -s -w $(git ls-files -- '**/*.go')

produces only changes to whitespace (consistent use of TAB, better
whitespace around operators, columnar alignment in lists), preferred
ordering for imports, and eliding excess syntax (unneeded '()' or
';'), at least for my version of gofmt (Fedora's
golang-bin-1.20.6-1.fc38).

This fixes all .go files directly in git control.  Later patches will
tackle (most) Go style problems in the generated files, and automate
ways to ensure we don't regress (that automation may cause fallout
where other versions of Go are differently picky; if that happens,
we'll follow ideas learned from libvirt when they automated gofmt as
part of their CI).

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-ID: <20230726175027.856419-2-eblake@redhat.com>
[eblake: Split 590 and 620 changes into earlier patches]
Acked-by: Laszlo Ersek <lersek@redhat.com>