FVN4TICG4UKBMKUHCZ2KOLQYPEJZGBEN3KLDP6LOMD2MGQERT5HAC
let (i, res) = fold_many0(
complete(|i| parse_content_line(leading_char, i)),
String::new,
|s, r| s + r.as_str(),
)(i)?;
let (i, res) = if leading_char == '+' {
fold_many1(
complete(|i| parse_content_line(leading_char, i)),
String::new,
|s, r| s + r.as_str(),
)(i)?
} else {
fold_many0(
complete(|i| parse_content_line(leading_char, i)),
String::new,
|s, r| s + r.as_str(),
)(i)?
};