RE:RE:RE:RE:tC - TGZ and EDVHi tC,
Can't give you a definitive answer, but I suspect the most likely outcome is that you will be "squeezed" shortly before completion date. I.e. stock lenders will demand their shares back, so that they receive EDV shares.
That's one of the hazards of shorting: you can be forced to cover your position at any time if the borrow is withdrawn.
After completion, lenders will probably make EDV shares available again, if anyone wants to be short.
Cheers,
Mark