Output version upgrade info using puts

[nwhetsell]

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This PR changes the two-line upgrade message to use puts for the second line (oh1 is still used for the first line). This prevents version numbers from being truncated when upgrading formulae, which can happen if a formula has a very long name or is in a non-core tap. More info is at #16942 and this comment on that issue.

I attempted to write a test for this, but I have not been successful. This is my attempted test (for inclusion in cmd/upgrade):

it "outputs complete version numbers", :integration_test do
  allow($stdout).to receive(:tty?).and_return(true)
  allow(Tty).to receive(:width).and_return(80)

  name = "testball-with-long-name-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
  setup_test_formula name

  expect { brew "upgrade" }
    .to output(/^  -> 0.1\b/).to_stdout
    .and be_a_success
end

The problem I’m having is that $stdout.tty? doesn’t seem to return true, so no messages are truncated here (because $stdout.tty? is actually false):

title = Tty.truncate(title.to_s) if $stdout.tty? && !verbose && truncate == :auto

Consequently, this test is passing currently (that is, without the changes in this PR), so I left this test out.

[apainintheneck]

Don't worry about the test. This should be good as is.

[MikeMcQuaid]

Great work here, thanks again @nwhetsell!