func Failf(format string, val ...interface{}) error {
	return glg.out(FAIL, format, val...)
}
func Failf(format string, val ...interface{}) error {
	return glg.out(FAIL, format, val...)
}
func Failf ( format string , val ... interface { } ) error { return glg . out ( FAIL , format , val ... ) }
// Failf outputs formatted Failed log
Failf outputs formatted Failed log