Add a comment with 'from_nickel', fixes #1889
Add a comment with 'from_nickel', fixes #1889

NiLuJe/koreader,poire-z/koreader,Frenzie/koreader,mihailim/koreader,robert00s/koreader,Hzj-jie/koreader,mwoz123/koreader,Markismus/koreader,lgeek/koreader,NiLuJe/koreader,poire-z/koreader,koreader/koreader,koreader/koreader,Frenzie/koreader,NickSavage/koreader,chihyang/koreader,houqp/koreader,apletnev/koreader,pazos/koreader,frankyifei/koreader