bug#47599: 28.0.50; Feature request improve/update isearch

[Gregory Heytings]

> > > 1) Option or command to automatically go to the other end on exit.
> >
> > It seems the conclusion was that it should not be an option. As for a 
> > command, there were objections against binding it to a key, but without 
> > a keybinding such command has little sense.
>
> I attach a patch which implements these two "options" in isearch-exit.

And here is an updated patch which adds three options to isearch-exit: C-u 
RET moves point to the other end, C-u C-u RET activates region around 
match, C-u C-u C-u RET moves point to the other end and activate region 
around match.

0001-Add-options-when-exiting-isearch.patch
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