[tex-hyphen] hyphenation different in xelatex?

Philip Taylor P.Taylor at Rhul.Ac.Uk
Mon Sep 7 23:52:30 CEST 2015

Reinhard Kotucha wrote:

> And pdftex is 100% backwards compatible with DEK's TeX.

Well, not really : compare the result of expanding (e.g.,)

	\expandafter \ifx \csname pdfximage\endcsname \relax UNDEFINED\else

in the two engines ...

** Phil.

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