Fix update doc from filesystem cause redundant authorship stringify
Fix update doc from filesystem cause redundant authorship stringify

hackmdio/hackmd,Rwing/hackmd,aswathyjacob8/newtest,hackmdio/hackmd,PeterDaveHello/hackmd,Yukaii/hackmd,ironhack/hackmd,ironhack/hackmd,Yukaii/hackmd,PeterDaveHello/hackmd,Rwing/hackmd,jackycute/HackMD,jackycute/HackMD,PeterDaveHello/hackmd,jackycute/HackMD,aswathyjacob8/newtest,aswathyjacob8/newtest,ironhack/hackmd,Rwing/hackmd,Yukaii/hackmd,hackmdio/hackmd