thread_list

# File lib/debug.rb, line 815
    def thread_list(num)
      th = get_thread(num)
      if th == Thread.current
        @stdout.print "+"
      else
        @stdout.print " "
      end
      @stdout.printf "%d ", num
      @stdout.print th.inspect, "\t"
      file = context(th).instance_eval{@file}
      if file
        @stdout.print file,":",context(th).instance_eval{@line}
      end
      @stdout.print "\n"
    end