insert-char and post-self-insert-hook

[T.V. Raman]

Q: Should insert-char call post-self-insert-hook (doesn't at
present)  to be mutually consistent with self-insert-char --
reasoning:

At least when used for inserting unicode chars via C-x8RET the
end-user behavior of insert-char is very similar to
self-insert-command
-- 

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