func Clean(s string) string {
	s = spacesRe.ReplaceAllString(s, " ")
	s = beginEndSpacesRe.ReplaceAllString(s, "")
	return s
}
func Clean(s string) string {
	s = spacesRe.ReplaceAllString(s, " ")
	s = beginEndSpacesRe.ReplaceAllString(s, "")
	return s
}
// Clean compresses all adjacent whitespace to a single space and trims s.