use gix_object::bstr::{BStr, ByteSlice};use nom::{    branch::alt,    bytes::complete::{tag, take_while_m_n},    error::ParseError,    IResult,}; fn is_hex_digit_lc(b: u8) -> bool {    matches!(b, b'0'..=b'9' | b'a'..=b'f')} /// Copy from https://github.com/Byron/gitoxide/blob/f270850ff92eab15258023b8e59346ec200303bd/gix-object/src/immutable/parse.rs#L64pub fn hex_hash<'a, E: ParseError<&'a [u8]>>(i: &'a [u8]) -> IResult<&'a [u8], &'a BStr, E> {    // NOTE: It's important to be able to read all hashes, do not parameterize it. Hashes can be rejected at a later stage    // if needed.    take_while_m_n(        gix_hash::Kind::shortest().len_in_hex(),        gix_hash::Kind::longest().len_in_hex(),        is_hex_digit_lc,    )(i)    .map(|(i, hex)| (i, hex.as_bstr()))} pub fn newline<'a, E: ParseError<&'a [u8]>>(i: &'a [u8]) -> IResult<&'a [u8], &'a [u8], E> {    alt((tag(b"\r\n"), tag(b"\n")))(i)}