Comments on Watchlist Custom email

When using Watchlist Custom email v1.0 with XWiki Collaboration Suite 2015(2015-5) the notification emails have errors in the subject:

• XWiki updates, {0,choice,0#No|1#One|1<{0}} document{0,choice,0#s|1#|2#s} ha{0,choice,0#ve|1#s|1<ve} been modified since {1}