Bug?: --ewc-kfac flag never triggers defaults due to arg name mismatch (kfac_ewc vs ewc_kfac)

[LTong-g]

May I ask if the 19th line of params/param_values, if checkattr(args, 'kfac_ewc'): should be if checkattr(args, 'ewc_kfac'):? Because in params/options, line 221 is param_reg.add_argument("--ewc-kfac", action="store_true")