Minor cleaning

[Aerijo]

Just a couple of style and redundant code changes (I imagine there was some reason at one point for declaring a rule to conflict with itself...).

Also, I was wondering the reason for

Array.prototype.slice.call(arguments, 2))

over

arguments.slice(2)

(and similar with seq.apply(null, ...) vs seq(...).

[yitzchak]

arguments is not actually an array, so slice won't work. A better solution would probably to use rest parameters.