Doc: Be more specific on dtmv

doc.zih.tu-dresden.de/docs/jobs_and_resources/barnard_test.md

@@ -170,15 +170,16 @@ target not the source filesystem.
 
     ```
     marie@barnard$ ws_allocate numbercrunch 90
-         ```
+    ```
 
 ??? "Migration to `/data/horse`"
 
     === "Source: old `/scratch`"
 
-        If you transfer data from the old scratch to `/data/horse` it is sufficient to use `dtmv`
-        instead of `dtcp` since this data is already copied to the new filesystem and you just need to
-        move it to the right place.
+        If you transfer data from the old `/scratch` to `/data/horse`, it is sufficient to use
+        `dtmv` instead of `dtcp` since this data is already copied to the new filesystem and you
+        just need to move it to the right place (the Lustre metadata system will update the
+        correspoding entries).
 
         ```console
         marie@barnard$ dtmove /data/horse/lustre/scratch2/0/marie-numbercrunch /data/horse/ws/marie-numbercrunch