[XeTeX] Discretionary line-breaks in Tamil

[Philip Taylor]

Ulrike Fischer wrote:

> plain uses a legacy font (cmr10), latex lmroman10-regular.otf.
>

But both lack a glyph at U+200B; is it therefore the case that Latin 
Roman /includes/ U+200B in its repertoire but does not populate it, 
whilst Computer Modern excludes everything above U+00FF?

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