$longer(x,y) is supposed to be a boolean function

[percontation]

tf_func_longer just calls tf_func_longest, which I believe is wrong.

The documentation I see says that $longer(x,y) is supposed to be like $greater($len(x),$len(y)), rather than like $longest(x,y).

[Oleksiy-Yakovenko]

Fixed, thanks for noticing!