Did configuration - Seems overly complex!

config.go

// Config holds the properties and values used for configuration
type Config struct {
	dateFormat string
}

// DefaultConfig is the set of configuration values used if none other is given.
var DefaultConfig = Config{"2006-01-02"}

// FromFile returns the configuration to use for did
func FromFile(path string) (c Config, e error) {
	c = DefaultConfig
	if lines, err := File2lines(path); err == nil {
		for _, line := range lines {
			prop, val, propErr := propertyOf(line)
			if propErr == nil && prop == "dateformat" && ValidDateFormat(val) {
				format, formatErr := ToGoDateFormat(val)
				if formatErr == nil {
					c.dateFormat = format
				}
			} else if propErr != nil {
				e = propErr
			}
		}
	} else if err != nil {
		e = err
	}
	return
}

func propertyOf(str string) (key, val string, err error) {
	split := strings.Split(strings.TrimSpace(strings.TrimRight(str, "\n")), "=")
	if len(split) == 2 {
		return split[0], split[1], nil
	}
	return "", "", fmt.Errorf(fmt.Sprintf("String '%s' cannot be read as property.", str))
}