I am not sure who to notify about it, so I'll post it here. There is a typo in the help with vectors if you use AnswerFormatHelp.pl and then add [@ AnswerFormatHelp("vectors") @]* to the code.
At the beginning of the file it opens, it says that "j is the same as <0,1,0> or <1,0>". It should be "<0,1>" there at the end.
Thank you.