-Char and attribute of EndOfLine ID of split line.
OPT FOLD { " " | fold-char | 0xXX | default } [ON | OFF]
fold-char:char code of EndOfLine ID of fold line(bynary and
split long text line)
ON :display attr is same as of lineno-column.
OFF :display attr is same as of file content display
column.
(ON/OFF is applied to both EOL and FOLD char)