const internal/strconv.float64MantBits

5 uses

	internal/strconv (current package)
		atof.go#L15: 	float64info = floatInfo{float64MantBits, float64ExpBits, float64Bias}
		ftoa.go#L29: 	float64MantBits = 52
		ftoa.go#L100: 		mantBits = float64MantBits
		ftoa.go#L230: 		mantBits = float64MantBits
		uscale.go#L176: 		mantBits = float64MantBits