class Diff::LCS::Hunk

was skipped.
a truthy value so that if there is no overlap, you can know the merge
Merges this hunk and the provided hunk together if they overlap. Returns

def merge(hunk)
  if overlaps?(hunk)
    @start_old = hunk.start_old
    @start_new = hunk.start_new
    blocks.unshift(*hunk.blocks)
  else
    nil
  end
end