fix readme

Author: chenby

README.md

@@ -388,7 +388,7 @@ migrate_flush=yes
 
 1.  When migrating to a cluster, this tool uses the cluster's `nodes.conf` file and does not handle `MOVED` or `ASK` redirections. Therefore, a key limitation is that the cluster **MUST** be in a stable state during the migration. This means there should be no slots in a `migrating` or `importing` state, and no failovers (promoting a replica to master) should occur.
 2.  When using `rst` to migrate data to a cluster, the following commands are not supported: `PUBLISH`, `SWAPDB`, `MOVE`, `FLUSHALL`, `FLUSHDB`, `MULTI`, `EXEC`, `SCRIPT FLUSH`, `SCRIPT LOAD`, `EVAL`, `EVALSHA`.
-3.  Additionally, the following commands are **ONLY SUPPORTED WHEN ALL KEYS IN THE COMMAND BELONG TO THE SAME SLOT** (e.g., `del {user}:1 {user}:2`): `RPOPLPUSH`, `SDIFFSTORE`, `SINTERSTORE`, `SMOVE`, `ZINTERSTORE`, `ZUNIONSTORE`, `DEL`, `UNLINK`, `RENAME`, `RENAMENX`, `PFMERGE`, `PFCOUNT`, `MSETNX`, `BRPOPLPUSH`, `BITOP`, `MSET`, `COPY`, `BLMOVE`, `LMOVE`, `ZDIFFSTORE`, `GEOSEARCHSTORE`.
+3.  Additionally, the following commands are **ONLY SUPPORTED WHEN ALL KEYS IN THE COMMAND BELONG TO THE SAME SLOT** (e.g., `del {user}:1 {user}:2`): `RPOPLPUSH`, `SDIFFSTORE`, `SINTERSTORE`, `SMOVE`, `ZINTERSTORE`, `ZUNIONSTORE`, `DEL`, `UNLINK`, `RENAME`, `RENAMENX`, `PFMERGE`, `PFCOUNT`, `MSETNX`, `BRPOPLPUSH`, `BITOP`, `MSET`, `COPY`, `BLMOVE`, `LMOVE`, `ZDIFFSTORE`, `GEOSEARCHSTORE`, `MSETEX`.
 
 ## Hacking `ret`
 

README.zh_CN.md

@@ -402,7 +402,7 @@ migrate_flush=yes
 ## 同步的限制
 
 1. 我们通过集群的 `nodes.conf` 文件来同步数据到集群. 因为我们没有处理 `MOVED` `ASK` 重定向. 因此唯一的限制是集群在同步期间 **必须** 是稳定的状态. 这意味着集群 **必须** 不存在 `migrating`, `importing` 这样的slot. 而且没有主从切换. 
-2. 当使用 `rst` 命令迁移数据到集群的时候. 下面的命令不支持： `PUBLISH,SWAPDB,MOVE,FLUSHALL,FLUSHDB,MULTI,EXEC,SCRIPT FLUSH,SCRIPT LOAD,EVAL,EVALSHA`. 下面的命令**有限支持** `RPOPLPUSH,SDIFFSTORE,SINTERSTORE,SMOVE,ZINTERSTORE,ZUNIONSTORE,DEL,UNLINK,RENAME,RENAMENX,PFMERGE,PFCOUNT,MSETNX,BRPOPLPUSH,BITOP,MSET,COPY,BLMOVE,LMOVE,ZDIFFSTORE,GEOSEARCHSTORE`.**只有这些命令里包含的 keys 在同一个slot的时候**(eg: `del {user}:1 {user}:2`)才支持.
+2. 当使用 `rst` 命令迁移数据到集群的时候. 下面的命令不支持： `PUBLISH,SWAPDB,MOVE,FLUSHALL,FLUSHDB,MULTI,EXEC,SCRIPT FLUSH,SCRIPT LOAD,EVAL,EVALSHA`. 下面的命令**有限支持** `RPOPLPUSH,SDIFFSTORE,SINTERSTORE,SMOVE,ZINTERSTORE,ZUNIONSTORE,DEL,UNLINK,RENAME,RENAMENX,PFMERGE,PFCOUNT,MSETNX,BRPOPLPUSH,BITOP,MSET,COPY,BLMOVE,LMOVE,ZDIFFSTORE,GEOSEARCHSTORE,MSETEX`.**只有这些命令里包含的 keys 在同一个slot的时候**(eg: `del {user}:1 {user}:2`)才支持.
 
 ## Hack ret