iredis/docs/update-redis-doc.md

How to Catch Up with Latest Redis-doc

1. git pull in submodule.
2. Overwrite iredis/data/commands.json.
3. Diff with old commands.json, make the changes.
4. mv redis-doc/commands/*.md iredis/data/commands
5. prettier --write --prose-wrap always iredis/data/commands/*.md

Done!