打开shCore.css

找到

.syntaxhighlighter .toolbar
{
        position: absolute !important;
        right: 0px !important;
        top: 0px !important;
        font-size: 1px !important;
        padding: 8px 8px 8px 0 !important; /* in px because images don't scale with ems */
        display: none;//添加这句
}