inspect

# File lib/irb/ext/history.rb, line 85
    def inspect
      if @contents.empty?
        return real_inspect
      end

      unless (last = @contents.pop)[1].equal?(self)
        @contents.push last
        last = nil
      end
      str = @contents.collect{|no, val|
        if val.equal?(self)
          "#{no} ...self-history..."
        else
          "#{no} #{val.inspect}"
        end
      }.join("\n")
      if str == ""
        str = "Empty."
      end
      @contents.push last if last
      str
    end