revise docstring to omit impl specific naming of _download

Author: d-w-moore

irods/manager/data_object_manager.py

@@ -287,8 +287,9 @@ def get(
             replica_sort_function: a sort key function dictating the order of replica query results in 'self.replicas'.
                 If not specified, a default value of None will cause irods.data_objects._DEFAULT_SORT_KEY_FN to be
                 selected to determine the sort order.
-            **options: keyword arguments to be passed onto the _download function;  A combination of possible options
-                to be relayed to the iRODS data object open() call.
+            **options: a combination of possible iRODS keyword options to be relayed to the data object open() call.
+                For a download request, FORCE_FLAG_KW may be used to ensure any pre-existing file at the 'local_path'
+                will be overwritten.
 
         Returns:
             an iRODSDataObject representing the object at the given path.