Description

    1.Modify the problem trimToCurrentLength without parameters
    2.Modify the problem that the descriptions of two interfaces
    of plainarray are consistent
    3.Correct the wrong interface in lightweightset
    4.Complete the missing equal case in XTS
    #I4WPBS:Correct the questionnaire questions raised by the test
Signed-off-by: Nwangyong1995626wywz <wangyong237@huawei.com>