# File lib/rbot/core/irclog.rb, line 55
  def logfile_close(where_str, reason = 'unknown reason')
    f = @logs.delete(where_str) or return
    stamp = Time.now.strftime '%Y/%m/%d %H:%M:%S'
    f[1].puts "[#{stamp}] @ Log closed by #{@bot.myself.nick} (#{reason})"
    f[1].close
  end