chr(13) and chr(10) are the carriage return line feed CR LF characters, so to strip them out:
select replace(replace(m.long_notes,chr(10),' '),chr(13),' ') from mytable m;
chr(13) and chr(10) are the carriage return line feed CR LF characters, so to strip them out:
select replace(replace(m.long_notes,chr(10),' '),chr(13),' ') from mytable m;