# File lib/yard/core_ext/file.rb, line 18
  def self.relative_path(from, to)
    from = expand_path(from).split(SEPARATOR)
    to = expand_path(to).split(SEPARATOR)
    from.length.times do
      break if from[0] != to[0]
      from.shift; to.shift
    end
    fname = from.pop
    join(*(from.map { RELATIVE_PARENTDIR } + to))
  end