func linkify(text string) string {
	// swap space with dash
	link := strings.Replace(text, " ", "-", -1)
	// discard some special characters
	discard, _ := regexp.Compile("[,/]")
	link = discard.ReplaceAllString(link, "")
	// lowercase
	return strings.ToLower(link)
}
func linkify(text string) string {
	// swap space with dash
	link := strings.Replace(text, " ", "-", -1)
	// discard some special characters
	discard, _ := regexp.Compile("[,/]")
	link = discard.ReplaceAllString(link, "")
	// lowercase
	return strings.ToLower(link)
}
// linkify transforms a string into a markdown anchor link
// I could not find a proper doc, so rules here a mostly empirical