Merge pull request #479 from codecrafters-io/andy/clarify-ack

Clarify the `WAIT` command and acknowledgment

Author: andy1li

stage_descriptions/replication-16-my8.md

@@ -2,17 +2,17 @@ In this stage, you’ll implement support for the `WAIT` command on the master.
 
 ### The `WAIT` command
 
-The `WAIT` command is used to check how many replicas have acknowledged a write command. This allows a client to measure the durability of a write command before considering it successful.
+The `WAIT` command is used to check how many replicas have acknowledged all previous write commands. This allows a client to measure the durability of a write command before considering it successful.
 
-The command format is: 
+The command format is:
 
 ```bash
 WAIT <numreplicas> <timeout>
 ```
 
 Here's what each argument means:
 
-- `<numreplicas>`: The minimum number of replicas that must acknowledge the write command.
+- `<numreplicas>`: The minimum number of replicas that must acknowledge all previous write commands.
 - `<timeout>`: The maximum time (in milliseconds) the client is willing to wait.
 
 For example:

stage_descriptions/replication-18-na2.md

@@ -3,6 +3,7 @@ In this stage, you’ll extend your `WAIT` implementation to handle the case whe
 ### `WAIT` with propagated commands
 
 In previous stages, we handled the cases where:
+
 - No replicas were connected, and the master could safely return `0`.
 - Replicas were connected, but hadn't received any write commands.
 
@@ -12,10 +13,10 @@ To do this, the master must send `REPLCONF GETACK *` to replicas if there are pe
 
 The `WAIT` command should complete when either:
 
-- The required number of replicas has acknowledged the last write command, or
+- The required number of replicas has acknowledged all previous write commands, or
 - The timeout expires.
 
-Either way, the master should return the number of replicas that acknowledged the command as a [RESP integer](https://redis.io/docs/latest/develop/reference/protocol-spec/#integers).
+Either way, the master should return the number of replicas that acknowledged all previous write commands as a [RESP integer](https://redis.io/docs/latest/develop/reference/protocol-spec/#integers).
 
 ### Tests