As described previously in #6820, nano gets "\r\n" when typing a newline, but it has '\n' bound for a different purpose. Luckily, this is now only present when we ssh into SerenityOS and run nano there. A quick investigation shows that nano sets different termios settings when running over SSH or running in the Terminal.

Over SSH:

[#0 nano(44:44)]: /dev/pts/1 set_termios: ECHO=false, ISIG=true, ICANON=false, ECHOE=true, ECHOK=true, ECHONL=false, ISTRIP=false, ICRNL=false, INLCR=false, IGNCR=false, OPOST=true, ONLCR=true

In Terminal:

[#0 nano(47:47)]: /dev/pts/0 set_termios: ECHO=false, ISIG=false, ICANON=false, ECHOE=true, ECHOK=true, ECHONL=false, ISTRIP=false, ICRNL=false, INLCR=false, IGNCR=false, OPOST=false, ONLCR=false

When running over SSH, the debug console will display warnings about unimplemented termios flags, but they are unrelated.