proper format of limits

Exercise-Configuration.md

@@ -286,7 +286,9 @@ Example:
 
 Mandatory items are bold, optional italic, description of items follows:
 
-* **${box identification}** - ...
+* **${test identification}** - ...
+    * **${pipeline identification}** - ...
+        * **${box identification}** - ...
             * _wall-time_ - ...
             * _memory_ - ...
             * _parallel_ - ...
@@ -294,11 +296,15 @@ Mandatory items are bold, optional italic, description of items follows:
 Example:
 
 ```
-box-id-1:
+test-id-1:
+  pipeline-id-1:
+    box-id-1:
       wall-time: 5
       memory: 50
       parallel: 500
-box-id-2:
+test-id-2:
+  pipeline-id-2:
+    box-id-2:
       wall-time: 6
       memory: 60
 ```