[luatex] Interfere with page breaking to balance pages

[Patrick Gundlach]

>> you can do something like this:
>> 
>> tex.box["AtBeginShipoutBox"]
>> 
>> that's a bit more luaeque IMO.
> 
> Nice, but when did Taco tell you that secret?  I can't find it in the
> LuaTeX manual. :/


4.13.4 Attribute, count, dimension, skip and token registers

"It is possible to use the names of relevant \attributedef, \countdef, \dimendef, \skipdef, or \toksdef control sequences as indices to these tables[...]"


and I just tried it with tex.box[] and it worked :)

Patrick