code: func getEscapeToGroundBytes() []byte {
  	escapeToGroundBytes := getByteRange(0x30, 0x4F)
  	escapeToGroundBytes = append(escapeToGroundBytes, getByteRange(0x51, 0x57)...)
  	escapeToGroundBytes = append(escapeToGroundBytes, 0x59)
  	escapeToGroundBytes = append(escapeToGroundBytes, 0x5A)
  	escapeToGroundBytes = append(escapeToGroundBytes, 0x5C)
  	escapeToGroundBytes = append(escapeToGroundBytes, getByteRange(0x60, 0x7E)...)
  	return escapeToGroundBytes
  }
docs: // See http://www.vt100.net/emu/vt500_parser.png for description of the complex
  // byte ranges below