code: func (p *printer) change(cl *pb.GerritChange) {
  	switch {
  	case cl.Host == "chromium-review.googlesource.com":
  		p.linkf("https://crrev.com/c/%d/%d", cl.Change, cl.Patchset)
  	case cl.Host == "chrome-internal-review.googlesource.com":
  		p.linkf("https://crrev.com/i/%d/%d", cl.Change, cl.Patchset)
  	default:
  		p.linkf("https://%s/c/%s/+/%d/%d", cl.Host, cl.Project, cl.Change, cl.Patchset)
  	}
  }
docs: // change prints cl.