If you don't want to install KDE dependencies for run Kate I found a solution that could work until Scite implementation in GNU/Linux (?) haven't got the command "Copy as RTF", take a look here
So let's go:
sudo apt-get install wine synapse
wine: Windows Emulator ;)
synapse: fast application launcher
download notepad++ installer version
go to Downloads, chmod +x
executable file (permissions to execute, could do graphically with properties of file, in permissions)
install it! (with default values works)
now you can run it easily with synapse:
if is launched: Ctrl+Space (or Super (windows key)+Space) and type "notepad" (if no appear, press Arrow Down and search it!)
write a text in, for example:
for i=1:3
%comment!
end
and now select it, with right button of mouse "plugin commands > copy text with syntax highlighting"
paste it!
in LibreOffice Writer: be carefull, use Ctrl+Shift+V or Edit>Paste Especial>Formated Text [RTF]
in Abiword works with Ctrl+V