func Format(format string, t time.Time) string {
	fn := func(match string) string {
		return repl(match, t)
	}
	return fmtRe.ReplaceAllStringFunc(format, fn)
}
func Format(format string, t time.Time) string {
	fn := func(match string) string {
		return repl(match, t)
	}
	return fmtRe.ReplaceAllStringFunc(format, fn)
}
func Format ( format string , t time . Time ) string { fn := func ( match string ) string { return repl ( match , t ) } return fmtRe . ReplaceAllStringFunc ( format , fn ) }
// Format return string with % directives expanded.
// Will return error on unknown directive.
Format return string with % directives expanded . Will return error on unknown directive .