func (rs *Ruleset) Capitalize(word string) string {
	return strings.ToUpper(word[:1]) + word[1:]
}
func (rs *Ruleset) Capitalize(word string) string {
	return strings.ToUpper(word[:1]) + word[1:]
}
func ( rs * Ruleset ) Capitalize ( word string ) string { return strings . ToUpper ( word [ : 1 ] ) + word [ 1 : ] }
// uppercase first character
uppercase first character