Remove Enter/Newline from a String By PL/SQL

DECLARE
   temp   VARCHAR2 (32767) := 'This is a string using
ENTER button. ';
BEGIN
   DBMS_OUTPUT.put_line (temp);
   DBMS_OUTPUT.put_line (
      REPLACE (REPLACE (temp, CHR (13), ''), CHR (10), ' '));
END;