[XeTeX] additional beginL endL nodes in math

[Philip Taylor]

David Carlisle wrote:

> Phil, it's hard to argue that working right-to-left text should be an
> opt-in (or even opt-out)
> feature of xetex. I may wish for an ideal world in which this could be
> fixed another way,
> but I don't think an option would help at all.

Fair enough.  My thought was simply that if a sufficiently large number
of users are dependent (even tacitly) on the current behaviour, then
opting-in to the new should not be out of the question ...

** Phil.