Update README.md (#34)

README.md

@@ -6,10 +6,12 @@ The Aardappel is an lightweight CDC receiver for consistent asynchronous replica
 The Apprdappel pod receives CDC streams from a source YDB database, restores linearizability of transaction using heartbeat info, and applies modifications atomically into the target YDB database.
 
 ### How to create compatible CDC
+```
 YDB_EXEC="ydb -e <DATABASE_ENDPOINT> -d <DATABASE_NAME>"
 
 ${YDB_EXEC} 'alter table <TABLE_NAME> add changefeed <CDC_NAME> with (format="JSON", mode="UPDATES", virtual_timestamps=true, resolved_timestamps = Interval("PT1S"));'
-${YDB_EXEC} 'alter topic <TABLE_NAME>/<CDC_NAME> add consumer <CDC_CONSUMER_NAME>;
+${YDB_EXEC} 'alter topic <TABLE_NAME>/<CDC_NAME> add consumer <CDC_CONSUMER_NAME>;'
+```
 
 ### How to configure aardappel
 [Configuration example](https://github.com/ydb-platform/aardappel/blob/main/cmd/aardappel/config.yaml)