* keymap.c (QCadvertised_binding): New constant.

* keymap.c (QCadvertised_binding): New constant.
(syms_of_keymap): Initialize it.
(Fwhere_is_internal): Try and use bindings from :advertised-binding
if applicable.

* progmodes/xscheme.el (xscheme-evaluation-commands):
Put a :advertised-binding property rather than using
advertised-xscheme-send-previous-expression.
(advertised-xscheme-send-previous-expression): Declare obsolete.
* emulation/crisp.el (crisp-mode-map): Use `undo' rather than
`advertised-undo'.
(crisp-mode): Add corresponding bindings to
undo's :advertised-binding instead.
* dired.el (dired-mode-map): Put a :advertised-binding property rather
than using dired-advertised-find-file.
(dired-advertised-find-file):
* simple.el (advertised-undo):
* wid-edit.el (advertised-widget-backward): Declare obsolete.
(widget-keymap): Put a :advertised-binding property rather
than using advertised-widget-backward.
* bindings.el (ctl-x-map): Put a :advertised-binding property rather
than using advertised-undo.
* tutorial.el (tutorial--default-keys): Adjust accordingly.