Function pad

cli/clitest/golden.go:303–311

(s string, n int)

}

func pad(s string, n int) string {
	if len(s) >= n {
		return s
	}
	n -= len(s)
	pre := n / 2
	post := n - pre
	return strings.Repeat("=", pre) + s + strings.Repeat("=", post)
}