// and exponents themselves are not padded to two digits.
	abs := math.Abs(f)
	fmt := byte('f')
	if abs != 0 {
		if abs < 1e-6 || abs >= 1e21 {
			fmt = 'e'
		}
	}
	dst = strconv.AppendFloat(dst, f, fmt, -1, 64)
	if fmt == 'e' {
		// clean up e-09 to e-9
		n := len(dst)
		if n >= 4 && dst[n-4] == 'e' && dst[n-3] == '-' && dst[n-2] == '0' {
			dst[n-2] = dst[n-1]
			dst = dst[:n-1]
		}
	}

pkg sort, type Interface interface, Swap(int, int)
pkg sort, type StringSlice []string
pkg strconv, const IntSize ideal-int
pkg strconv, func AppendBool([]uint8, bool) []uint8
pkg strconv, func AppendFloat([]uint8, float64, uint8, int, int) []uint8
pkg strconv, func AppendInt([]uint8, int64, int) []uint8
pkg strconv, func AppendQuote([]uint8, string) []uint8
pkg strconv, func AppendQuoteRune([]uint8, int32) []uint8