Fix docstring format (#640)

deepspeed/runtime/engine.py

@@ -1236,9 +1236,12 @@ def load_checkpoint(self,
             load_module_strict: Optional. Boolean to strictly enforce that the keys in state_dict of module and checkpoint match.
             load_optimizer_states: Optional. Boolean to load the training optimizer states from Checkpoint. Ex. ADAM's momentum and variance
             load_lr_scheduler_states: Optional. Boolean to add the learning rate scheduler states from Checkpoint.
-        Return:
-            load_path: Path of the loaded checkpoint. None if loading the checkpoint failed
-            client_state: State dictionary used for loading required training states in the client code.
+        Returns:
+            A tuple of ``load_path`` and ``client_state``.
+
+            *``load_path``: Path of the loaded checkpoint. ``None`` if loading the checkpoint failed.
+
+            *``client_state``: State dictionary used for loading required training states in the client code.
         """
 
         if tag is None: