title: Time duration to string 2h instead 2h0m0s
body: <p>The default time.Duration String method formats the duration with adding <code>0s</code> for minutes and <code>0m0s</code> for hours. Is there function that I can use that will produce <code>5m</code> instead <code>5m0s</code> and <code>2h</code> instead <code>2h0m0s</code> ... or I have to implement my own?</p>