sanitize_path

# File lib/rdoc/options.rb, line 1140
  def sanitize_path path
    require 'pathname'
    dot = Pathname.new('.').expand_path

    path.reject do |item|
      path = Pathname.new(item).expand_path
      relative = path.relative_path_from(dot).to_s
      relative.start_with? '..'
    end
  end