Fix the < and > symbols are doubly escaped which affected by executing preventXSS twice
Fix the < and > symbols are doubly escaped which affected by executing preventXSS twice

Yukaii/hackmd,jackycute/HackMD,hackmdio/hackmd,Yukaii/hackmd,Rwing/hackmd,PeterDaveHello/hackmd,Rwing/hackmd,hackmdio/hackmd,jackycute/HackMD,Yukaii/hackmd,hackmdio/hackmd,PeterDaveHello/hackmd,jackycute/HackMD,Rwing/hackmd,PeterDaveHello/hackmd