RE: Shift selection using interactive spec

[Drew Adams]

> The problem is that code like (and mark-active transient-mark-mode)
> should still work, because that is used at many places.

Yes, including by external libraries and perhaps user init files. 

Anything that forces code changes having to do with activating or
deactivating the mark is a bother. Code such as (deactivate-mark), (setq
deactivate-mark nil), push-mark with non-nil 3rd arg, tests of mark-active,
or setting or binding mark-active.