There are a couple of bugs in the TeX sources for the docs (see above url for a patch). I've tried the patch myself and it works well but when you test it, view the default refcard.ps output using gs -sDEVICE=x11 (or x11alpha) because gv and kghostview don't show it properly. Same goes for the refcard.dvi in kdvi (xdvi works ok). There's an extra piece of the patch for usersch2.tex which should be skipped but seeing it reminded me that it would be nice if the ebuild would put pari.el in the emacs site-lisp directory if "emacs" appears in the USE flags. :)
Used most of the patch and added the .el file as you said. Please give -r3 a try when available. Thanks!
I tried -r3 but it didn't build or install the docs at all. I didn't have enough bash history to save a log for you but there were some error messages about not being able to stat/find the tex sources - probably just a directory name typo in the ebuild?
Please emerge it again (don't forget the USE flags) and provide the log - if there was a typo, I shouldn't have the docs installed here. Must be some other reason.
Sorry; my fault - it worked when I emerged it just now with USE="doc" (I didn't realise you'd changed that). Thanks for the fixes. :)
Hm, I think this can be closed, then.