Update ma_single.md

docs/envs/MaMuJoCo/ma_single.md

@@ -20,7 +20,7 @@ The Purpose of these is to allow researchers to debug multi-agent learning algor
 
 
 ## Action Space
-The action spaces is depended on the partitioning.
+The shape of the action space depends on the partitioning. The partitioning has the following form:
 
 ## Observation Space
 The agent receives the same observations as the single agent Gymnasium environment.