遇到一个很悲催的问题，markdown 页面内链接语法不支持

编写 post 时，后向的 3000 端口的 ruby 服务经常挂。

附日志：

  ^[[35mMOPED:^[[0m 127.0.0.1:27017 ^[[33mCOMMAND^[[0m      database=admin command=^[[34m{:ismaster=>1} ^[[0m(^[[32m0.3016ms^[[0m)
  ^[[35mMOPED:^[[0m 127.0.0.1:27017 ^[[33mQUERY^[[0m        database=ruby_china_dev collection=users selector=^[[34m{"$query"=>{"_id"=>1}, "$orderby"=>{:_id=>1}} ^[[0mflags=[:slave_ok] limit=-1 skip=0 fields=nil (^[[32m0.3622ms^[[0m)
  ^[[35mMOPED:^[[0m 127.0.0.1:27017 ^[[33mCOMMAND^[[0m      database=ruby_china_dev command=^[[34m{:count=>:notifications, :query=>{"user_id"=>1, "read"=>false}} ^[[0m(^[[32m0.3190ms^[[0m)
  ^[[35mMOPED:^[[0m 127.0.0.1:27017 ^[[33mQUERY^[[0m        database=ruby_china_dev collection=topics selector=^[[34m{"_id"=>2} ^[[0mflags=[:slave_ok] limit=0 skip=0 fields=nil (^[[32m0.4594ms^[[0m)
WARNING: Can't mass-assign protected attributes: node_id, user_id, last_reply_user_id, source