[luatex] some bits of opentype math testing

[Hans Hagen]

Hi Ulrik,

> I've been doing a bit of OpenType math testing once again with
> LuaLaTeX, XeLaTeX, and ConTeXt MkIV, all based on the final
> (currently frozen) TL2010 pretest version.

I'll have a look at the reported context bits. Keep in mind that the 
font/math code in context tl-2010 is not the latest (a coupe of month 
old since we've frozen in sync with luatex 0.60). Thanks for looking 
into it.

Hans

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