* gnus-art.el (gnus-mime-display-alternative): Use

* gnus-art.el (gnus-mime-display-alternative): Use
gnus-local-map-property.
(gnus-mime-display-alternative): Ditto.
(gnus-insert-mime-security-button): Ditto.
(gnus-insert-next-page-button): Ditto.
(gnus-button-prev-page): Take optional args.
(gnus-insert-prev-page-button): widget-convert.

* gnus-util.el (gnus-local-map-property): New function.

* gnus-art.el (gnus-prev-page-map): Use parent map.
(gnus-next-page-map): Ditto.

* gnus-spec.el (gnus-parse-format): Clean up.
(gnus-parse-format): Do complex formatting for %=.

* gnus-fun.el (gnus-display-x-face-in-from): Add the string
"X-Face: " to the data in the built-in scenario.

* gnus-spec.el (gnus-parse-simple-format): Use gnus-pad-form.
(gnus-correct-pad-form): Renamed.
(gnus-tilde-max-form): Clean up.
(gnus-pad-form): Use gnus-use-correct-string-widths.

* gnus-fun.el (gnus-display-x-face-in-from): Use native xface
support if that is available.