[fix] plugins/send2ebook: crash on setting download dir (#4944)
[fix] plugins/send2ebook: crash on setting download dir (#4944)

Also fix weird indentation.

Reported on the forum: https://www.mobileread.com/forums/showthread.php?p=3833021#post3833021
poire-z/koreader,poire-z/koreader,mwoz123/koreader,mihailim/koreader,houqp/koreader,NiLuJe/koreader,Frenzie/koreader,koreader/koreader,Markismus/koreader,koreader/koreader,pazos/koreader,Frenzie/koreader,Hzj-jie/koreader,NiLuJe/koreader