Function difft::display::hunks::merge_adjacent

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

If any hunks are sufficiently close that they have overlapping lines, merge them.

For example, given a hunk from lines 8-10 and a hunk from lines 12-15 with 5 context lines, combine the two hunks.