Function difft::display::hunks::merge_adjacent

pub(crate) fn merge_adjacent(
    hunks: &[Hunk],
    opposite_to_lhs: &HashMap<LineNumber, HashSet<LineNumber>, BuildHasherDefault<FxHasher>>,
    opposite_to_rhs: &HashMap<LineNumber, HashSet<LineNumber>, BuildHasherDefault<FxHasher>>,
    max_lhs_src_line: LineNumber,
    max_rhs_src_line: LineNumber,
    num_context_lines: usize
) -> Vec<Hunk>