// If r is not a valid Unicode code point, it is interpreted as the Unicode
// replacement character U+FFFD.
func QuoteRuneToASCII(r rune) string {
	return quoteRuneWith(r, '\'', true, false)
}

// AppendQuoteRuneToASCII appends a single-quoted Go character literal representing the rune,
// as generated by [QuoteRuneToASCII], to dst and returns the extended buffer.
func AppendQuoteRuneToASCII(dst []byte, r rune) []byte {