-Char and attribute of EndOfLine ID.
OPT EOL { " " | eol-char | 0xXX | default } [ON | OFF]
eol-char:char code of EndOfLine ID.
#ifdef UNX
#ifdef AIX
default :"_".
#else
default :x1d except under kon. "_" under kon.
#endif
#else
default :x1b.
#endif
ON :display attr is same as of lineno-column.
OFF :display attr is same as of file content display
column.
(ON/OFF is applyed to both EOL and FOLD char)