func unicode/utf8.RuneLen

5 uses

	unicode/utf8 (current package)
		utf8.go#L327: func RuneLen(r rune) int {

	fmt
		format.go#L161: 		i -= utf8.RuneLen(rune(u))
		scan.go#L334: 		size = utf8.RuneLen(rr)

	regexp
		regexp.go#L280: 				l += utf8.RuneLen(r)

	strings
		strings.go#L550: 			width = utf8.RuneLen(c)