Create a line feed.
The operator fnew_line puts out a line feed into the current output file. At the same time the output buffer is emptied.
get_file(::'output':CurrentFile) > set_file(::'standard_output','output':) > fwrite_string(::'Good Morning':) > fnew_line(:::) > set_file(::CurrentFile,'output':).
If an output file is open the operator fnew_line returns the value TRUE. Otherwise an exception is raised.