const unicode/utf8.runeErrorByte1

3 uses

	unicode/utf8 (current package)
		utf8.go#L66: 	runeErrorByte1 = tx | (RuneError>>6)&maskx
		utf8.go#L381: 		p[1] = runeErrorByte1
		utf8.go#L408: 		return append(p, runeErrorByte0, runeErrorByte1, runeErrorByte2)