bug#66394: 29.1; Make register-read-with-preview more useful

[Stefan Kangas]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> What do others think about making this the default?
>
> My understanding is that usage style of registers varies a lot, where
> some people use them extensively, so any change that makes them
> heavier/slower (such a requiring a confirmation) will alienate them.
> For that reason I'd opt to keep the defaults as close to the previous
> behavior, focusing on making the new features discoverable rather than
> enabled by default.

+1