Fix line break for debug output

[sualko]

If you use screen to listen for the serial output, you see something like this:

message
       message

This is because only a Line Feed and no Carriage Return is send. \r\n is also the default for the Arduino print class (Print.cpp) and it's also documented in avr-libc stdio.

[terrillmoore]

Thanks for your contribution.

I'm going to have to think about this. It's a deliberate decision not to do this, based on being critically low on space, and based on it being trivial to configure terminal programs to map \n to \r\n.

Best regards,
--Terry

[sualko]

If you like I can also introduce a new config macro to include/exclude those lines.

based on it being trivial to configure terminal programs to map \n to \r\n

At least for screen I found no easy solution to do that.