[luatex] (not) stretching delimiters.

[David Carlisle]

 Given the plain tex file



$\bordermatrix{&\cr 1&0\cr2&0\cr}$


\bye



I get the attached output with large delimiters with pdftex and
unstretched ones with 0.87.

(Since I compiled this myself for cygwin, and patched the format
building, it's possible that I just have things set up wrong but I
thought I'd flag it anyway)

David
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