watchCommand注释错误修正
Merge pull request #4 from WangYulong/patch-1

watchCommand注释错误修正
修正 intsetMoveTail 函数的注释错误，感谢 SSS 的提醒：
http://www.redisbook.com/en/latest/compress-datastruct/intset.html#comment-905626278
Merge branch 'unstable' of github.com:huangz1990/annotated_redis_source into unstable
Merge pull request #3 from huangz1990/unstable

pull new file