Function count_changes_with_algorithm 

pub fn count_changes_with_algorithm(
    old_content: &str,
    new_content: &str,
    algorithm: Algorithm,
    use_git_histogram: bool,
) -> (usize, usize)

Count insertions and deletions using the given line-diff algorithm.

Uses the same compacted line alignment as unified patches and crate::diff::line_change_counts.