examples/filesystem: include newline in `cat` command
examples/filesystem: include newline in `cat` command

authmillenon/RIOT,ant9000/RIOT,jasonatran/RIOT,basilfx/RIOT,kYc0o/RIOT,miri64/RIOT,ant9000/RIOT,authmillenon/RIOT,authmillenon/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,basilfx/RIOT,basilfx/RIOT,miri64/RIOT,kaspar030/RIOT,miri64/RIOT,kaspar030/RIOT,ant9000/RIOT,kYc0o/RIOT,jasonatran/RIOT,OlegHahm/RIOT,kYc0o/RIOT,authmillenon/RIOT,OlegHahm/RIOT,miri64/RIOT,OTAkeys/RIOT,basilfx/RIOT,miri64/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,jasonatran/RIOT,basilfx/RIOT,ant9000/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,authmillenon/RIOT,ant9000/RIOT,kaspar030/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kaspar030/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT