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newline caches, if they exist.

declarations.

(character_width, disptab_matches_widthtab, recompute_width_table,
width_run_cache_on_off): New functions.
(compute_motion): Call width_run_cache_on_off.  If this buffer's
width run cache is enabled, consult it to see if we need to
traverse a region character-by-character; store information in the
cache after doing so.  Call find_before_next_newline instead of
writing out an equivalent loop explicitly, to take advantage of
the newline cache.
Doc fixes.

(buffer_display_table): New declaration.

(Fend_of_line): Replace call to Fforward_line and search loop with
call to find_before_next_newline.

width_run_cache, width_table, and cache_long_line_scans.

(Fget_buffer_create): Initialize new members of struct buffer.
(Fkill_buffer): Free memory occupied by caches.
(init_buffer_once): Set default value for cache_long_line_scans in
buffer_defaults, and give it a bit in buffer_local_flags.
(syms_of_buffer): Add DEFVAR_PER_BUFFER for cache_long_line_scans.

(region-cache.o): New target.
(buffer.o, indent.o, search.o): Depend on region-cache.h.

Cross-reference it in @node Screen Lines.

(Ffile_name_completion): Perform the completion even if the
name part is empty.

(do_completion): Use test_completion.
(Fminibuffer_complete_and_exit): If completion is already
exact, don't try to complete it.

handle the case of no commas after @node.

(read_char_x_menu_prompt): Optionally don't use local maps.
(syms_of_keyboard): Set up Lisp variable.

(struct Lisp_Marker): Add a member of that type.  Delete unused member
`modified'.

rmail-summary-font-lock-keywords, dired-font-lock-keywords,
shell-font-lock-keywords, texi-font-lock-keywords,
perl-font-lock-keywords): Deleted.

(font-lock-mode): Doc fix; use add/remove-hook, not
setq; removed make-local-variable of font-lock-no-comments.
(font-lock-set-defaults): Do it there, and use:
(font-lock-defaults-alist): Use it to set font-lock-keywords,
font-lock-keywords-case-fold-search and font-lock-no-comments.
(turn-on-font-lock): New function.
(font-lock-fontify-buffer): Made interruptible; deleted messages.

(font-lock-fontify-region): Made syntax state reliable
by widening within new restriction; let cstart and cend for speed;
outputs message.
(font-lock-after-change-function): Remove spurious goto-char and use
forward-line, not 1+ end-of-line, for end of fontification region.
(font-lock-any-properties-p): Removed, use text-property-not-all.

(font-lock-*-face): facename values are themselves.
(font-lock-variable-name-face, font-lock-reference-face): New vars.
(font-lock-doc-string-face): Removed.
(font-lock-keywords): Extended value syntax.
(font-lock-hack-keywords): Cope with it; outputs initial message.

Merged in face-lock.el:
(font-lock-display-type, font-lock-background-mode)
(font-lock-face-attributes): New variables, use it.
(font-lock-make-face): New function, use them.

(comint-exec): Use open-network-stream if command is a cons pair.

(pascal-mode): Set comment-start-skip and comment-end.
Set font-lock-keywords locally.

(perl-mode): Set font-lock-keywords locally.

(asm-mode): Set font-lock-keywords locally.

(texinfo-mode): Set font-lock-keywords locally.

(shell-mode): Set font-lock-keywords locally.

(dired-mode): Set font-lock-keywords locally.

(mail-mode): Set font-lock-keywords locally.

(rmail-variables): Set font-lock-keywords locally.

(rmail-summary-mode): Set font-lock-keywords locally.

(outline-mode): Set font-lock-keywords locally.

(change-log-font-lock-keywords): New variable.

(compilation-mode): Use kill-all-local-variables.
Set font-lock-keywords locally.

(HAVE_MKTIME): Add #undef.