I noticed that the parser is quite sloppy. The following incorrect commands for example pass without an error:
T_{i j k}::TableauSymmetry( shape={2,1}, indices={0} );
T_{i j k}::TableauSymmetry( shape={2,1}, indices={0,1,2} ] );
T_{i j k}::TableauSymmetry( shape={2,1}, indices={0,1,2}, xyz );
I guess that is not intended?