Writes a data with new-line to a file.
filewriteln <file handle> <data>
Writes <data> and the new-line characters (CR+LF) to the file specified by <file handle>.
When the <data> type is the character string, the data is written as string.
When the <data> type is the integer, the least significant byte(0-255) regards as the ASCII code and the ASCII character is written.
filewriteln fhandle '---------cut here---------'
; write a NUL character (0x00) and the new-line character (CR+LF). filewrite fhandle 0