let slice = &buffer[init..];
        if looks_binary(slice) {
            return Ok(None);
        }

        detector.feed(&buffer[init..], true);
        if let Some(e) = crate::get_valid_encoding(&detector, None, true, &buffer[init..]) {

        detector.feed(slice, true);
        if let Some(e) = crate::get_valid_encoding(&detector, None, true, slice) {

fn looks_binary(buf: &[u8]) -> bool {
    if buf.is_empty() {
        return false;
    }
    buf.iter().any(|&b| b == 0)
}