Lines 1095-1098 control whether the downvote arrow is displayed or not.
So, to answer your question, yes, it bothers me that there's very rarely a clear enumeration or description of features.
On the other hand, it's been a wonderful opportunity to learn Arc.
(I'm only half joking - Arc was actually my first stab at functional programming and I probably wouldn't have tried it if pg had bothered to document HN's features)
Lines 1095-1098 control whether the downvote arrow is displayed or not.
So, to answer your question, yes, it bothers me that there's very rarely a clear enumeration or description of features.
On the other hand, it's been a wonderful opportunity to learn Arc.
(I'm only half joking - Arc was actually my first stab at functional programming and I probably wouldn't have tried it if pg had bothered to document HN's features)