consdiff: remove string slice usage

}

/// Splits `input` at the first `directory-signature`.

#[allow(clippy::string_slice)] // TODO

fn split_directory_signatures(input: &str) -> Result<(&str, &str)> {

    let parse_input = ParseInput::new(input, "");

    let mut items = ItemStream::new(&parse_input)?;

        match item {

            Some(DIRECTORY_SIGNATURE_KEYWORD) => {

                let offset = items.byte_position();

                return Ok((&input[..offset], &input[offset..]));

                return Ok(input

                    .split_at_checked(offset)

                    .ok_or_else(|| internal!("Calculated an invalid offset"))?);

            }

            Some(_) => {

                // Consume the just peeked item.

    /// Extract a single command from a line iterator that yields lines

    /// of the diffs.  Return None if we're at the end of the iterator.

    #[allow(clippy::string_slice)] // TODO

    fn from_line_iterator<I>(iter: &mut I) -> Result<Option<Self>>

    where

        I: Iterator<Item = &'a str>,

        }

        let (range, command) = command.split_at(command.len() - 1);

        let (low, high) = if let Some(comma_pos) = range.find(',') {

            (

                range[..comma_pos].parse::<usize>()?,

                Some(range[comma_pos + 1..].parse::<RangeEnd>()?),

            )

        let (low, high) = if let Some((lo, hi)) = range.split_once(',') {

            (lo.parse::<usize>()?, Some(hi.parse::<RangeEnd>()?))

        } else {

            (range.parse::<usize>()?, None)

        };