env/env.go
func (e EnvVar) String() string {
	b := bytes.NewBuffer(nil)
	for _, env := range e {
		// don't include invalid strings
		if len(strings.SplitN(env, "=", 2)) < 2 {
			continue
		}
		fmt.Fprintln(b, env)
	}
	return b.String()
}
func (e EnvVar) String() string {
	b := bytes.NewBuffer(nil)
	for _, env := range e {
		// don't include invalid strings
		if len(strings.SplitN(env, "=", 2)) < 2 {
			continue
		}
		fmt.Fprintln(b, env)
	}
	return b.String()
}
// String returns key=val format of the environment variables.
// Each on a line.