[NTG-context] update

[Hans Hagen]

Hi,

I updated LMTX. Most improvements are in 'math' as Mikael and I keep 
mailing down some details that bother us. We also have some updates in 
the math fonts that Daniel Flipo maintains so the repertoire of 
alternatives with all-right math support grows.

As a side note: lmtx installs nicely on my android (12) phone (userland 
ubuntu) and luametatex compiles nicely from source (as it's aarch64) in 
about a minute. No decent editor to text real documents but who knows 
what a properly dockable (linux supporting) phone can do in a few years.
A simple

\starttext \dorecurse{1000}{\samplefile{tufte}\par} \stoptext

runs at over 55 pps (85 pps on my laptop). Making a format takes 4 
seconds (second time, after caching, which is about twice the time my 
laptop takes).

Hans

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                                           Hans Hagen | PRAGMA ADE
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