copyedit to make show as file format

Signed-off-by: Victoria Bialas <[email protected]>

docs/compose-file.md

@@ -494,7 +494,7 @@ The general format is shown here.
         aliases:
           - alias2
 
-In the example below, three services are provided (`web`, `worker`, and `db`), along with two networks (`new` and `legacy`). The `db` service is reachable at the hostname `db` or `database` on the `new` network, and at `db` or `mysql` on the legacy network.
+In the example below, three services are provided (`web`, `worker`, and `db`), along with two networks (`new` and `legacy`). The `db` service is reachable at the hostname `db` or `database` on the `new` network, and at `db` or `mysql` on the `legacy` network.
 
     version: 2