bug#64724: 30.0.50; Inconsistency between manual, comments in the code, and implementation of point adjustment

[Stefan Monnier]

> I think you confuse two different point-adjustment behaviors.  What
> the ELisp manual describes is the one implemented in
> adjust_point_for_property and the code which calls it from
> command_loop_1.  set_point_both does a different job for different
> situations, AFAIU.

Indeed, the `set_point_both` adjustment is an obsolete (mis-)feature
that has been deprecated since Emacs-25, when
`inhibit-point-motion-hooks`s default has been changed to t (and
replaced with `cursor-sensor-mode` and
`cursor-intangible-mode`).


        Stefan