Fix markdown tests regarding latest redcarpet, rdiscount and kramdown
Fix markdown tests regarding latest redcarpet, rdiscount and kramdown

fly19890211/slim,slim-template/slim,sideci-sample/sideci-sample-slim,XueQian/slim,metallurgical/slim,etdev/slim,XueQian/slim,slim-template/slim,ericboehs/slim,etdev/slim,raxoft/slim,mojavelinux/slim,mojavelinux/slim,zakuro9715/slim,yterajima/slim,raxoft/slim,metallurgical/slim,JuanitoFatas/slim,ruijsun/slim,cheunghy/slim,zakuro9715/slim,JuanitoFatas/slim,ruijsun/slim,Nikeshsuwal/slim,Nikeshsuwal/slim,fly19890211/slim,ericboehs/slim,slim-template/slim,cheunghy/slim