Bug in Example?

[bitnom]

For...

func doUpdate(url string) error {
	resp, err := http.Get(url)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	err := update.Apply(resp.Body, update.Options{})
	if err != nil {
		// error handling
	}
	return err
}

I get: no new variables on left side of :=

[bitnom]

Had to change the second usage of err to err2

[ivahaev]

No need to change variable name. Just use "=" instead of ":="