func strings.IndexRune

9 uses

	strings (current package)
		strings.go#L73: 	return IndexRune(s, r) >= 0
		strings.go#L127: func IndexRune(s string, r rune) int {
		strings.go#L212: 		return IndexRune(s, r)
		strings.go#L225: 		if IndexRune(chars, c) >= 0 {
		strings.go#L245: 		if IndexRune(chars, rc) >= 0 {
		strings.go#L277: 		if IndexRune(chars, r) >= 0 {

	golang.org/x/tools/go/packages
		golist.go#L924: 			msg = msg[strings.IndexRune(msg, '\n')+1:]

	regexp/syntax
		parse.go#L1169: 		end := strings.IndexRune(t, '>')
		parse.go#L1683: 		end := strings.IndexRune(s, '}')