# File lib/more/facets/argvector.rb, line 220
  def parse_line(line=nil)
    if line
      case line
      when String
        argv = Shellwords.shellwords(line)
      else
        argv = line.to_ary.dup
        line = argv.join(' ')
      end
    else
      argv = ARGV.dup
      line = argv.join(' ')
    end
    return line, argv
  end