(buffer-stale-function): New variable.
(auto-revert-list-diff, auto-revert-dired-file-list)
(auto-revert-dired-changed-p, auto-revert-buffer-p): Delete.
(auto-revert-handler): Take over some functionality of deleted functions.
(auto-revert-buffers): Delete call to auto-revert-buffer-p.
(ruler-mode-header-line-format-old): Don't `make-variable-buffer-local'.
(ruler-mode-ruler-function): Default to `ruler-mode-ruler'.
(ruler-mode-header-line-format): Simply funcall the above.
(ruler-mode): Use `make-local-variable' and `kill-local-variable'
to save/restore a previous header line format.
(ruler-mode-space): Don't depend on a numeric WIDTH value.
(ruler-mode-ruler): Use symbolic display elements for scrollbar,
fringes and margins width.
(ruler-mode-ruler-function): Default to ruler-mode-ruler
Added context menu support in smerge mode.
Most of the part is written by Stefan Monnier.
* smerge-mode.el (smerge-context-menu-map, smerge-context-menu): New
keyman and menu.
(smerge-text-properties): New function.
(smerge-remove-props): New function.
(smerge-popup-context-menu): New function.
(smerge-resolve): Call `smerge-remove-props'.
(smerge-keep-base, smerge-keep-other, smerge-keep-mine):
Ditto.
(smerge-keep-current): Ditto.
(smerge-kill-current): New function.
(smerge-match-conflict): Detect the file as `a same-diff conflict'
if the filename is "ANCESTOR". Put text properties.
* hl-line.el (hl-line-range-function): New variable.
(hl-line-move): New function.
(global-hl-line-highlight): Use `hl-line-move'.
(hl-line-highlight): Ditto.
* scroll-bar.el (scroll-bar-columns): New function derived from
ruler-mode.el.
* fringe.el (fringe-columns): New function derived from
ruler-mode.el.
* ruler-mode.el (top-level): Require scroll-bar and fringe.
(ruler-mode-left-fringe-cols)
(ruler-mode-right-fringe-cols): Use `fringe-columns'.
(ruler-mode-right-scroll-bar-cols)
(ruler-mode-left-scroll-bar-cols): Use `scroll-bar-columns'.
(ruler-mode-ruler-function): New variable.
(ruler-mode-header-line-format): Call `ruler-mode-ruler-function'
if the value for `ruler-mode-ruler-function'is given.
* hexl.el (hexl-mode-hook): Make the hook customizable.
(hexl-address-area, hexl-ascii-area, hexl-ascii-cursor): New
customize variables.
(hexlify-buffer): Put font-lock-faces on the address area and
the ascii area.
(hexl-activate-ruler): New function.
(hexl-follow-line): New function.
(hexl-highlight-line-range): New function.
(hexl-mode-ruler): New function.
