[luatex] problem with slnunicode's find

[Patrick Gundlach]

Hi Stephan,

> I would expect the positions of 'b' being 2 and 3, resp., as that are the lengths of the strings as returned by unicode.utf8.len.  However, unicode.utf8.find seems to have another notion of the length of a string.

It is documented: (Well, sort of, you need to downlaod the slunicode library and look into 'unittest'.)

--	NOTE: find positions are in bytes for all ctypes!
--	use ascii.sub to cut found ranges!
--	this is a) faster b) more reliable

Patrick