Improve the documentation further on inside the serialport source file
Improve the documentation further on inside the serialport source file

Change-Id: If1bd6ae14c16169c45054faa5cc92ecf47231bf6
Reviewed-by: Andre Hartmann <ae729fb1c7d8758f7538d0da659d7dbc2720843e@gmx.de>
Reviewed-by: Denis Shienkov <1ad2dee90c89b865e4a01188e9919a005e3f77cf@yandex.ru>

kobolabs/qtserialport,kobolabs/qtserialport,RoadWorksSoftware/QtSerialPort-OS2,RoadWorksSoftware/QtSerialPort-OS2