[Emacspeak] Stage part of a hunk in magit

[Tim Makarios <emacspeak.correspondence@xxxxxxxxxxx>]

Hi,

I notice that Magit has a feature that lets you mark certain lines in a diff
and stage or unstage only those lines, even if adjacent lines have also been
modified.  This works for me in Magit 2.90.1 on Emacs 27.1, *unless* I've
loaded Emacspeak (version 54.0).

Is there some trick to getting this to work with Emacspeak?  It's not a
crucial feature of Magit, but it would be nice to have it work in Emacspeak.

All the best,

Tim
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