# File lib/asciidoctor/path_resolver.rb, line 121
  def initialize(file_separator = nil, working_dir = nil)
    @file_separator = file_separator.nil? ? (File::ALT_SEPARATOR || File::SEPARATOR) : file_separator
    if working_dir.nil?
      @working_dir = File.expand_path(Dir.pwd)
    else
      @working_dir = is_root?(working_dir) ? working_dir : File.expand_path(working_dir) 
    end
  end