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diff --git a/lisp/textmodes/ispell4.el b/lisp/textmodes/ispell4.el
deleted file mode 100644
index 78b6cc1b958..00000000000
--- a/lisp/textmodes/ispell4.el
+++ /dev/null
@@ -1,1114 +0,0 @@
-;;; ispell4.el --- this is the GNU EMACS interface to GNU ISPELL version 4.
-
-;; Copyright (C) 1990, 1991, 1993 Free Software Foundation, Inc.
-
-;; Keywords: wp
-
-;; This file is part of GNU Emacs.
-
-;; GNU Emacs is free software; you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-
-;; GNU Emacs is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-;; GNU General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
-
-;;; Commentary:
-
-;; This package provides a graceful interface to ispell, the GNU
-;; spelling checker.
-
-;;; Code:
-
-(defgroup ispell4 nil
-  "Interface to GNU ISPELL version 4."
-  :prefix "ispell-"
-  :group 'applications)
-
-(defcustom ispell-have-new-look t
-  "Non-nil means use the `-r' option when running `look'."
-  :type 'boolean
-  :group 'ispell4)
-
-(defvar ispell-enable-tex-parser nil
-  "Non-nil enables experimental TeX parser in Ispell for TeX-mode buffers.")
-
-(defvar ispell-process nil "The process running Ispell")
-(defvar ispell-next-message nil
-  "An integer: where in `*ispell*' buffer to find next message from Ispell.")
-
-(defcustom ispell-command "ispell"
-  "Command for running Ispell."
-  :type 'string
-  :group 'ispell4)
-
-(defcustom ispell-command-options nil
-  "*String (or list of strings) to pass to Ispell as command arguments.
-You can specify your private dictionary via the -p <filename> option.
-The -S option is always passed to Ispell as the last parameter,
-and need not be mentioned here."
-  :type '(repeat string)
-  :group 'ispell4)
-
-(defcustom ispell-look-command "look"
-  "*Command for running look."
-  :type 'string
-  :group 'ispell4)
-
-;Each marker in this list points to the start of a word that
-;ispell thought was bad last time it did the :file command.
-;Notice that if the user accepts or inserts a word into his
-;private dictionary, then some "good" words will be on the list.
-;We would like to deal with this by looking up the words again just before
-;presenting them to the user, but that is too slow on machines
-;without the select system call.  Therefore, see the variable
-;ispell-recently-accepted.
-(defvar ispell-bad-words nil
-  "A list of markers reflecting the output of the Ispell `:file' command.")
-
-;list of words that the user has accepted, but that might still
-;be on the bad-words list
-(defvar ispell-recently-accepted nil)
-
-;; Non-nil means we have started showing an alternatives window.
-;; This is the window config from before then.
-(defvar ispell-window-configuration nil)
-
-;t when :dump command needed
-(defvar ispell-dump-needed nil)
-
-(defun ispell-flush-bad-words ()
-  (while ispell-bad-words
-    (if (markerp (car ispell-bad-words))
-        (set-marker (car ispell-bad-words) nil))
-    (setq ispell-bad-words (cdr ispell-bad-words)))
-  (setq ispell-recently-accepted nil))
-
-(defun kill-ispell ()
-  "Kill the Ispell process.
-Any changes in your private dictionary
-that have not already been dumped will be lost."
-  (interactive)
-  (if ispell-process
-      (delete-process ispell-process))
-  (setq ispell-process nil)
-  (ispell-flush-bad-words))
-
-(put 'ispell-startup-error 'error-conditions
-     '(ispell-startup-error error))
-(put 'ispell-startup-error 'error-message
-     "Problem starting ispell - see buffer *ispell*")
-
-;; Start an ispell subprocess; check the version; and display the greeting.
-
-(defun start-ispell ()
-  (message "Starting ispell ...")
-  (let ((buf (get-buffer "*ispell*")))
-    (if buf
-        (kill-buffer buf)))
-  (condition-case err
-      (setq ispell-process
-            (apply 'start-process "ispell" "*ispell*" ispell-command
-                   (append (if (listp ispell-command-options)
-                               ispell-command-options
-                             (list ispell-command-options))
-                           '("-S"))))
-    (file-error (signal 'ispell-startup-error nil)))
-  (process-kill-without-query ispell-process)
-  (buffer-disable-undo (process-buffer ispell-process))
-  (accept-process-output ispell-process)
-  (let (last-char)
-    (save-excursion
-      (set-buffer (process-buffer ispell-process))
-      (bury-buffer (current-buffer))
-      (setq last-char (- (point-max) 1))
-      (while (not (eq (char-after last-char) ?=))
-        (cond ((not (eq (process-status ispell-process) 'run))
-               (kill-ispell)
-               (signal 'ispell-startup-error nil)))
-        (accept-process-output ispell-process)
-        (setq last-char (- (point-max) 1)))
-      (goto-char (point-min))
-      (let ((greeting (read (current-buffer))))
-        (if (not (= (car greeting) 1))
-            (error "Bad ispell version: wanted 1, got %d" (car greeting)))
-        (message "%s" (car (cdr greeting))))
-      (delete-region (point-min) last-char))))
-  
-;; Make sure ispell is ready for a command.
-;; Leaves buffer set to *ispell*, point at '='.
-
-(defun ispell-sync (intr)
-  (if (or (null ispell-process)
-          (not (eq (process-status ispell-process) 'run)))
-      (start-ispell))
-  (if intr
-      (interrupt-process ispell-process))
-  (let (last-char)
-    (set-buffer (process-buffer ispell-process))
-    (bury-buffer (current-buffer))
-    (setq last-char (- (point-max) 1))
-    (while (not (eq (char-after last-char) ?=))
-      (accept-process-output ispell-process)
-      (setq last-char (- (point-max) 1)))
-    (goto-char last-char)))
-
-;; Send a command to ispell.  Choices are:
-;; 
-;; WORD         Check spelling of WORD.  Result is
-;; 
-;;                       nil                       not found
-;;                       t                         spelled ok
-;;                       list of strings                   near misses
-;; 
-;; :file FILENAME       scan the named file, and print the file offsets of
-;;               any misspelled words
-;; 
-;; :insert WORD put word in private dictionary
-;; 
-;; :accept WORD don't complain about word any more this session
-;; 
-;; :dump                write out the current private dictionary, if necessary.
-;; 
-;; :reload              reread private dictionary (default: `~/ispell.words')
-;; 
-;; :tex
-;; :troff
-;; :generic     set type of parser to use when scanning whole files
-
-(defun ispell-cmd (&rest strings)
-  (save-excursion
-    (ispell-sync t)
-    (set-buffer (process-buffer ispell-process))
-    (bury-buffer (current-buffer))
-    (erase-buffer)
-    (setq ispell-next-message (point-min))
-    (while strings
-      (process-send-string ispell-process (car strings))
-      (setq strings (cdr strings)))
-    (process-send-string ispell-process "\n")
-    (accept-process-output ispell-process)
-    (ispell-sync nil)))
-
-(defun ispell-dump ()
-  (cond (ispell-dump-needed
-         (setq ispell-dump-needed nil)
-         (ispell-cmd ":dump"))))
-
-(defun ispell-insert (word)
-  (ispell-cmd ":insert " word)
-  (if ispell-bad-words
-      (setq ispell-recently-accepted (cons word ispell-recently-accepted)))
-  (setq ispell-dump-needed t))
-
-(defun ispell-accept (word)
-  (ispell-cmd ":accept " word)
-  (if ispell-bad-words
-      (setq ispell-recently-accepted (cons word ispell-recently-accepted))))
-
-;; Return the next message sent by the Ispell subprocess.
-
-(defun ispell-next-message ()
-  (save-excursion
-    (set-buffer (process-buffer ispell-process))
-    (bury-buffer (current-buffer))
-    (save-restriction
-      (goto-char ispell-next-message)
-      (narrow-to-region (point)
-                        (progn (forward-sexp 1) (point)))
-      (setq ispell-next-message (point))
-      (goto-char (point-min))
-      (read (current-buffer)))))
-
-(defun ispell-tex-buffer-p ()
-  (memq major-mode '(plain-tex-mode latex-mode slitex-mode)))
-
-(defvar ispell-menu-map (make-sparse-keymap "Spell"))
-(defalias 'ispell-menu-map ispell-menu-map)
-
-(define-key ispell-menu-map [ispell-complete-word-interior-frag]
-  '("Complete Interior Fragment" . ispell-complete-word-interior-frag))
-
-(define-key ispell-menu-map [ispell-complete-word]
-  '("Complete Word" . ispell-complete-word))
-
-(define-key ispell-menu-map [reload-ispell]
-  '("Reload Dictionary" . reload-ispell))
-
-(define-key ispell-menu-map [ispell-next]
-  '("Continue Check" . ispell-next))
-
-(define-key ispell-menu-map [ispell-message]
-  '("Check Message" . ispell-message))
-
-(define-key ispell-menu-map [ispell-word]
-  '("Check Word" . ispell-word))
-
-(define-key ispell-menu-map [ispell-region]
-  '("Check Region" . ispell-region))
-
-(define-key ispell-menu-map [ispell-buffer]
-  '("Check Buffer" . ispell))
-
-;;;autoload
-(defun ispell (&optional buf start end)
-  "Run Ispell over current buffer's visited file.
-First the file is scanned for misspelled words, then Ispell
-enters a loop with the following commands for every misspelled word:
-
-DIGIT   Near miss selector.  If the misspelled word is close to
-        some words in the dictionary, they are offered as near misses.
-r       Replace.  Replace the word with a string you type.  Each word
-        of your new string is also checked.
-i       Insert.  Insert this word in your private dictionary (by default,
-        `$HOME/ispell.words').
-a       Accept.  Accept this word for the rest of this editing session,
-        but don't put it in your private dictionary.
-l       Lookup.  Look for a word in the dictionary by fast binary
-        search, or search for a regular expression in the dictionary
-        using grep.
-SPACE   Accept the word this time, but complain if it is seen again.
-q, \\[keyboard-quit]    Leave the command loop.  You can come back later with \\[ispell-next]."
-  (interactive)
-  (if (null start)
-      (setq start 0))
-  (if (null end)
-      (setq end 0))
-
-  (if (null buf)
-      (setq buf (current-buffer)))
-  (setq buf (get-buffer buf))
-  (if (null buf)
-      (error "Can't find buffer"))
-  ;; Deactivate the mark, because we'll do it anyway if we change something,
-  ;; and a region highlight while in the Ispell loop is distracting.
-  (deactivate-mark)
-  (save-excursion
-    (set-buffer buf)
-    (let ((filename buffer-file-name)
-          (delete-temp nil))
-      (unwind-protect
-          (progn
-            (cond ((or (null filename)
-                       (find-file-name-handler buffer-file-name nil))
-                   (setq filename (make-temp-name "/usr/tmp/ispell"))
-                   (setq delete-temp t)
-                   (write-region (point-min) (point-max) filename))
-                  ((and (buffer-modified-p buf)
-                        (y-or-n-p (format "Save file %s? " filename)))
-                   (save-buffer)))
-            (message "Ispell scanning file...")
-            (if (and ispell-enable-tex-parser
-                     (ispell-tex-buffer-p))
-                (ispell-cmd ":tex")
-              (ispell-cmd ":generic"))
-            (ispell-cmd (format ":file %s %d %d" filename start end)))
-        (if delete-temp
-            (condition-case ()
-                (delete-file filename)
-              (file-error nil)))))
-    (message "Parsing ispell output ...")
-    (ispell-flush-bad-words)
-    (let (pos bad-words)
-      (while (numberp (setq pos (ispell-next-message)))
-        ;;ispell may check the words on the line following the end
-        ;;of the region - therefore, don't record anything out of range
-        (if (or (= end 0)
-                (< pos end))
-            (setq bad-words (cons (set-marker (make-marker) (+ pos 1))
-                                  bad-words))))
-      (setq bad-words (cons pos bad-words))
-      (setq ispell-bad-words (nreverse bad-words))))
-  (cond ((not (markerp (car ispell-bad-words)))
-         (setq ispell-bad-words nil)
-         (message "No misspellings.")
-         t)
-        (t
-         (message "Ispell parsing done.")
-         (ispell-next))))
-
-;;;autoload
-(defalias 'ispell-buffer 'ispell)
-
-(defun ispell-next ()
-  "Resume command loop for most recent Ispell command.
-Return value is t unless exit is due to typing `q'."
-  (interactive)
-  (setq ispell-window-configuration nil)
-  (prog1
-      (unwind-protect
-          (catch 'ispell-quit
-            ;; There used to be a save-excursion here,
-            ;; but that was annoying: it's better if point doesn't move
-            ;; when you type q.
-            (let (next)
-              (while (markerp (setq next (car ispell-bad-words)))
-                (switch-to-buffer (marker-buffer next))
-                (push-mark)
-                (ispell-point next "at saved position.")
-                (setq ispell-bad-words (cdr ispell-bad-words))
-                (set-marker next nil)))
-            t)
-        (ispell-dehighlight)
-        (if ispell-window-configuration
-            (set-window-configuration ispell-window-configuration))
-        (cond ((null ispell-bad-words)
-               (error "Ispell has not yet been run"))
-              ((markerp (car ispell-bad-words))
-               (message "%s"
-                        (substitute-command-keys
-                           "Type \\[ispell-next] to continue")))
-              ((eq (car ispell-bad-words) nil)
-               (setq ispell-bad-words nil)
-               (message "No more misspellings (but checker was interrupted)"))
-              ((eq (car ispell-bad-words) t)
-               (setq ispell-bad-words nil)
-               (message "Ispell done"))
-              (t
-               (setq ispell-bad-words nil)
-               (message "Bad ispell internal list"))))
-    (ispell-dump)))
-
-;;;autoload
-(defun ispell-word (&optional resume)
-  "Check the spelling of the word under the cursor.
-See the command `ispell' for more information.
-With a prefix argument, resume handling of the previous Ispell command."
-  (interactive "P")
-  (if resume
-      (ispell-next)
-    (condition-case err
-        (unwind-protect
-            (catch 'ispell-quit
-              (save-window-excursion
-                (ispell-point (point) "at point."))
-              (ispell-dump))
-          (ispell-dehighlight))
-      (ispell-startup-error
-       (cond ((y-or-n-p "Problem starting ispell, use old-style spell instead? ")
-              (load-library "spell")
-              (define-key esc-map "$" 'spell-word)
-              (spell-word)))))))
-
-;;;autoload (define-key esc-map "$" 'ispell-word)
-
-;;;autoload
-(defun ispell-region (start &optional end)
-  "Check the spelling for all of the words in the region."
-  (interactive "r")
-  (ispell (current-buffer) start end))
-
-(defun ispell-letterp (c)
-  (and c
-       (or (and (>= c ?A) (<= c ?Z))
-           (and (>= c ?a) (<= c ?z))
-           (>= c 128))))
-
-(defun ispell-letter-or-quotep (c)
-  (and c
-       (or (and (>= c ?A) (<= c ?Z))
-           (and (>= c ?a) (<= c ?z))
-           (= c ?')
-           (>= c 128))))
-
-(defun ispell-find-word-start ()
-  ;;backward to a letter
-  (if (not (ispell-letterp (char-after (point))))
-      (while (and (not (bobp))
-                  (not (ispell-letterp (char-after (- (point) 1)))))
-        (backward-char)))
-  ;;backward to beginning of word
-  (while (ispell-letter-or-quotep (char-after (- (point) 1)))
-    (backward-char))
-  (skip-chars-forward "'"))
-
-(defun ispell-find-word-end ()
-  (while (ispell-letter-or-quotep (char-after (point)))
-    (forward-char))
-  (skip-chars-backward "'"))
-
-(defun ispell-next-word ()
-  (while (and (not (eobp))
-              (not (ispell-letterp (char-after (point)))))
-    (forward-char)))
-
-;if end is nil, then do one word at start
-;otherwise, do all words from the beginning of the word where
-;start points, to the end of the word where end points
-(defun ispell-point (start message)
-  (let ((wend (make-marker))
-        rescan
-        end)
-    ;; There used to be a save-excursion here,
-    ;; but that was annoying: it's better if point doesn't move
-    ;; when you type q.
-    (goto-char start)
-    (ispell-find-word-start)            ;find correct word start
-    (setq start (point-marker))
-    (ispell-find-word-end)              ;now find correct end
-    (setq end (point-marker))
-    ;; Do nothing if we don't find a word.
-    (if (< start end)
-        (while (< start end)
-          (goto-char start)
-          (ispell-find-word-end)        ;find end of current word
-                                        ;could be before 'end' if
-                                        ;user typed replacement
-                                        ;that is more than one word
-          (set-marker wend (point))
-          (setq rescan nil)
-          (setq word (buffer-substring start wend))
-          (cond ((ispell-still-bad word)
-;;; This just causes confusion. -- rms.
-;;;          (goto-char start)
-;;;          (sit-for 0)
-                 (message "Ispell checking %s" word)
-                 (ispell-cmd word)
-                 (let ((message (ispell-next-message)))
-                   (cond ((eq message t)
-                          (message "%s: ok" word))
-                         ((or (null message)
-                              (consp message))
-                          (setq rescan
-                                (ispell-command-loop word start wend message)))
-                         (t
-                          (error "unknown ispell response %s" message))))))
-          (cond ((null rescan)
-                 (goto-char wend)
-                 (ispell-next-word)
-                 (set-marker start (point))))))
-    ;;clear the choices buffer; otherwise it's hard for the user to tell
-    ;;when we get back to the command loop
-    (let ((buf (get-buffer "*ispell choices*")))
-      (cond (buf
-             (set-buffer buf)
-             (erase-buffer))))
-    (set-marker start nil)
-    (set-marker end nil)
-    (set-marker wend nil)))
-  
-(defun ispell-still-bad (word)
-  (let ((words ispell-recently-accepted)
-        (ret t)
-        (case-fold-search t))
-    (while words
-      (cond ((eq (string-match (car words) word) 0)
-             (setq ret nil)
-             (setq words nil)))
-      (setq words (cdr words)))
-    ret))
-
-(defun ispell-show-choices (word message first-line)
-  ;;if there is only one window on the frame, make the ispell
-  ;;messages winow be small.  otherwise just use the other window
-  (let* ((selwin (selected-window))
-         (resize (eq selwin (next-window)))
-         (buf (get-buffer-create "*ispell choices*"))
-         w)
-    (or ispell-window-configuration
-        (setq ispell-window-configuration (current-window-configuration)))
-    (setq w (display-buffer buf))
-    (buffer-disable-undo buf)
-    (if resize
-        (unwind-protect
-            (progn
-              (select-window w)
-              (enlarge-window (- 6 (window-height w))))
-          (select-window selwin)))
-    (save-excursion
-      (set-buffer buf)
-      (bury-buffer buf)
-      (set-window-point w (point-min))
-      (set-window-start w (point-min))
-      (erase-buffer)
-      (insert first-line "\n")
-      (insert
-       "SPC skip; A accept; I insert; DIGIT select; R replace; \
-L lookup; Q quit\n")
-      (cond ((not (null message))
-             (let ((i 0))
-               (while (< i 3)
-                 (let ((j 0))
-                   (while (< j 3)
-                     (let* ((n (+ (* j 3) i))
-                            (choice (nth n message)))
-                       (cond (choice
-                              (let ((str (format "%d %s" n choice)))
-                                (insert str)
-                                (insert-char ?  (- 20 (length str)))))))
-                     (setq j (+ j 1))))
-                 (insert "\n")
-                 (setq i (+ i 1)))))))))
-
-(defun ispell-command-loop (word start end message)
-  (let ((flag t)
-        (rescan nil)
-        first-line)
-    (if (null message)
-        (setq first-line (concat "No near misses for '" word "'"))
-      (setq first-line (concat "Near misses for '" word "'")))
-    (ispell-highlight start end)
-    (while flag
-      (ispell-show-choices word message first-line)
-      (message "Ispell command: ")
-      (undo-boundary)
-      (let ((c (downcase (read-char)))
-            replacement)
-        (cond ((and (>= c ?0)
-                    (<= c ?9)
-                    (setq replacement (nth (- c ?0) message)))
-               (ispell-replace start end replacement)
-               (setq flag nil))
-              ((= c ?q)
-               (throw 'ispell-quit nil))
-              ((= c (nth 3 (current-input-mode)))
-               (keyboard-quit))
-              ((= c ? )
-               (setq flag nil))
-              ((= c ?r)
-               (ispell-replace start end (read-string "Replacement: "))
-               (setq rescan t)
-               (setq flag nil))
-              ((= c ?i)
-               (ispell-insert word)
-               (setq flag nil))
-              ((= c ?a)
-               (ispell-accept word)
-               (setq flag nil))
-              ((= c ?l)
-               (let ((val (ispell-do-look word)))
-                 (setq first-line (car val))
-                 (setq message (cdr val))))
-              ((= c ??)
-               (message
-                "Type 'C-h d ispell' to the emacs main loop for more help")
-               (sit-for 2))
-              (t
-               (message "Bad ispell command")
-               (sit-for 2)))))
-    rescan))
-
-(defun ispell-do-look (bad-word)
-  (let (regex buf words)
-    (cond ((null ispell-have-new-look)
-           (setq regex (read-string "Lookup: ")))
-          (t
-           (setq regex (read-string "Lookup (regex): " "^"))))
-    (setq buf (get-buffer-create "*ispell look*"))
-    (save-excursion
-      (set-buffer buf)
-      (delete-region (point-min) (point-max))
-      (if ispell-have-new-look
-          (call-process ispell-look-command nil buf nil "-r" regex)
-        (call-process ispell-look-command nil buf nil regex))
-      (goto-char (point-min))
-      (forward-line 10)
-      (delete-region (point) (point-max))
-      (goto-char (point-min))
-      (while (not (= (point-min) (point-max)))
-        (end-of-line)
-        (setq words (cons (buffer-substring (point-min) (point)) words))
-        (forward-line)
-        (delete-region (point-min) (point)))
-      (kill-buffer buf)
-      (cons (format "Lookup '%s'" regex)
-            (reverse words)))))
-    
-(defun ispell-replace (start end new)
-  (goto-char start)
-  (insert new)
-  (delete-region (point) end))
-
-(defun reload-ispell ()
-  "Tell Ispell to re-read your private dictionary."
-  (interactive)
-  (ispell-cmd ":reload"))
-
-(defun batch-make-ispell ()
-  (byte-compile-file "ispell.el")
-  (find-file "ispell.texinfo")
-  (let ((old-dir default-directory)
-        (default-directory "/tmp"))
-    (texinfo-format-buffer))
-  (Info-validate)
-  (if (get-buffer " *problems in info file*")
-      (kill-emacs 1))
-  (write-region (point-min) (point-max) "ispell.info"))
-
-(defcustom ispell-highlight t
-  "*Non-nil means to highlight ispell words."
-  :type 'boolean
-  :group 'ispell4)
-
-(defvar ispell-overlay nil)
-
-(defun ispell-dehighlight ()
-  (and ispell-overlay
-       (progn
-         (delete-overlay ispell-overlay)
-         (setq ispell-overlay nil))))
-
-(defun ispell-highlight (start end)
-  (and ispell-highlight 
-       window-system
-       (progn
-         (or ispell-overlay
-             (progn
-               (setq ispell-overlay (make-overlay start end))
-               (overlay-put ispell-overlay 'face
-                            (if (internal-find-face 'ispell)
-                                'ispell 'region))))
-         (move-overlay ispell-overlay start end (current-buffer)))))
-
-;;;; ispell-complete-word
-
-;;; Brief Description:
-;;; Complete word fragment at point using dictionary and replace with full
-;;; word.  Expansion done in current buffer like lisp-complete-symbol.
-;;; Completion of interior word fragments possible with prefix argument.
-
-;;; Known Problem: 
-;;; Does not use private dictionary because GNU `look' does not use it.  It
-;;; would be nice if GNU `look' took standard input; this would allow gzip'ed
-;;; dictionaries to be used.  GNU `look' also has a bug, see
-;;; `ispell-gnu-look-still-broken-p'.
-
-;;; Motivation: 
-;;; The `l', "regular expression look up", keymap option of ispell-word
-;;; (ispell-do-look) can only be run after finding a misspelled word.  So
-;;; ispell-do-look can not be used to look for words starting with `cat' to
-;;; find `catechetical' since `cat' is a correctly spelled word.  Furthermore,
-;;; ispell-do-look does not return the entire list returned by `look'.
-;;;  
-;;; ispell-complete-word allows you to get a completion list from the system
-;;; dictionary and expand a word fragment at the current position in a buffer.
-;;; These examples assume ispell-complete-word is bound to M-TAB as it is in
-;;; text-mode; the `Complete Word' and `Complete Interior Fragment' entries of
-;;; the "Spell" submenu under the "Edit" menu may also be used instead of
-;;; M-TAB and C-u M-TAB, respectively.
-;;;
-;;;   EXAMPLE 1: The word `Saskatchewan' needs to be spelled.  The user may
-;;;   type `Sas' and hit M-TAB and a completion list will be built using the
-;;;   shell command `look' and displayed in the *Completions* buffer:
-;;;
-;;;        Possible completions are:
-;;;        sash                               sashay
-;;;        sashayed                           sashed
-;;;        sashes                             sashimi
-;;;        Saskatchewan                       Saskatoon
-;;;        sass                               sassafras
-;;;        sassier                            sassing
-;;;        sasswood                           sassy
-;;;
-;;;   By viewing this list the user will hopefully be motivated to insert the
-;;;   letter `k' after the `sas'.  When M-TAB is hit again the word `Saskat'
-;;;   will be inserted in place of `sas' (note case) since this is a unique
-;;;   substring completion.  The narrowed completion list can be viewed with
-;;;   another M-TAB
-;;;
-;;;        Possible completions are:
-;;;        Saskatchewan                       Saskatoon
-;;;
-;;;   Inserting the letter `c' and hitting M-TAB will narrow the completion
-;;;   possibilities to just `Saskatchewan' and this will be inserted in the
-;;;   buffer.  At any point the user may click the mouse on a completion to
-;;;   select it.
-;;;
-;;;   EXAMPLE 2: The user has typed `Sasaquane' and M-$ (ispell-word) gives no
-;;;   "near-misses" in which case you back up to `Sas' and hit M-TAB and find
-;;;   the correct word as above.  The `Sas' will be replaced by `Saskatchewan'
-;;;   and the remaining word fragment `aquane' can be deleted.
-;;;
-;;;   EXAMPLE 3: If a version of `look' is used that supports regular
-;;;   expressions, then `ispell-have-new-look' should be t (its default) and
-;;;   interior word fragments may also be used for the search.  The word
-;;;   `pneumonia' needs to be spelled.  The user can only remember the
-;;;   interior fragment `mon' in which case `C-u M-TAB' on `mon' gives a list
-;;;   of all words containing the interior word fragment `mon'.  Typing `p'
-;;;   and M-TAB will narrow this list to all the words starting with `p' and
-;;;   containing `mon' from which `pneumonia' can be found as above.
-
-;;; The user-defined variables are:
-;;;
-;;;  ispell-look-command
-;;;  ispell-look-dictionary
-;;;  ispell-gnu-look-still-broken-p
-
-;;; Algorithm (some similarity to lisp-complete-symbol):
-;;;  
-;;; * call-process on command ispell-look-command (default: "look") to find
-;;;   words in ispell-look-dictionary matching `string' (or `regexp' if 
-;;;   ispell-have-new-look is t).  Parse output and store results in 
-;;;   ispell-lookup-completions-alist.
-;;; 
-;;; * Build completion list using try-completion and `string'
-;;; 
-;;; * Replace `string' in buffer with matched common substring completion.
-;;; 
-;;; * Display completion list only if there is no matched common substring.
-;;; 
-;;; * Rebuild ispell-lookup-completions-alist, on a next call, only when
-;;;   beginning of word fragment has changed.
-;;;  
-;;; * Interior fragments searches are performed similarly with the exception
-;;;   that the entire fragment at point is initially removed from the buffer,
-;;;   the STRING passed to try-completion and all-completions is just "" and
-;;;   not the interior fragment; this allows all completions containing the
-;;;   interior fragment to be shown.  The location in the buffer is stored to
-;;;   decide whether future completion narrowing of the current list should be
-;;;   done or if a new list should be built.  See interior fragment example
-;;;   above.
-;;;
-;;; * Robust searches are done using a `look' with -r (regular expression) 
-;;;   switch if ispell-have-new-look is t.
-
-;;;; User-defined variables.
-
-(defcustom ispell-look-dictionary nil
-  "*If non-nil then spelling dictionary as string for `ispell-complete-word'.
-Overrides default dictionary file such as \"/usr/dict/words\" or GNU look's
-\"${prefix}/lib/ispell/ispell.words\""
-  :type '(choice (const nil) file)
-  :group 'ispell4)
-
-
-(defcustom ispell-gnu-look-still-broken-p nil
-  "*t if GNU look -r can give different results with and without trailing `.*'.
-Example: `look -dfr \"^ya\" foo' returns nothing, while `look -dfr \"^ya.*\" foo'
-returns `yacc', where `foo' is a dictionary file containing the three lines
-
-   y
-   y's
-   yacc
-
-Both commands should return `yacc'.  If `ispell-complete-word' erroneously
-states that no completions exist for a string, then setting this variable to t
-will help find those completions."
-  :type 'boolean
-  :group 'ispell4)
-
-;;;; Internal variables.
-
-;;; Possible completions for last word fragment.
-(defvar ispell-lookup-completions-alist nil)
-
-;;; Last word fragment processed by `ispell-complete-word'.
-(defvar ispell-lookup-last-word nil)
-
-;;; Buffer local variables.
-
-;;; Value of interior-frag in last call to `ispell-complete-word'.
-(defvar ispell-lookup-last-interior-p nil)
-(make-variable-buffer-local 'ispell-lookup-last-interior-p)
-(put 'ispell-lookup-last-interior-p 'permanent-local t)
-
-;;; Buffer position in last call to `ispell-complete-word'.
-(defvar ispell-lookup-last-bow nil)
-(make-variable-buffer-local 'ispell-lookup-last-bow)
-(put 'ispell-lookup-last-bow 'permanent-local t)
-
-;;;; Interactive functions.
-;;;autoload
-(defun ispell-complete-word (&optional interior-frag)
-  "Complete word using letters at point to word beginning using `look'.
-With optional argument INTERIOR-FRAG, word fragment at point is assumed to be
-an interior word fragment in which case `ispell-have-new-look' should be t.
-See also `ispell-look-dictionary' and `ispell-gnu-look-still-broken-p'."
-
-  (interactive "P")
-
-  ;; `look' must support regexp expressions in order to perform an interior
-  ;; fragment search.
-  (if (and interior-frag (not ispell-have-new-look))
-      (error (concat "Sorry, `ispell-have-new-look' is nil.  "
-                     "You also will need GNU Ispell's `look'.")))
-
-  (let* ((completion-ignore-case t)
-
-         ;; Get location of beginning of word fragment.
-         (bow (save-excursion (skip-chars-backward "a-zA-Z'") (point)))
-
-         ;; Get the string to look up.
-         (string (buffer-substring bow (point)))
-
-         ;; Get regexp for which we search and, if necessary, an interior word
-         ;; fragment.
-         (regexp (if interior-frag
-                     (concat "^.*" string ".*")
-                   ;; If possible use fast binary search: no trailing `.*'.
-                   (concat "^" string
-                           (if ispell-gnu-look-still-broken-p ".*"))))
-
-         ;; We want all completions for case of interior fragments so set
-         ;; prefix to an empty string.
-         (prefix (if interior-frag "" string))
-
-         ;; Are we continuing from a previous interior fragment search?
-         ;; Check last value of interior-word and if the point has moved.
-         (continuing-an-interior-frag-p
-          (and ispell-lookup-last-interior-p
-               (equal ispell-lookup-last-bow bow)))
-
-         ;; Are we starting a unique word fragment search?  Always t for
-         ;; interior word fragment search.
-         (new-unique-string-p
-          (or interior-frag (null ispell-lookup-last-word)
-              (let ((case-fold-search t))
-                ;; Can we locate last word fragment as a substring of current
-                ;; word fragment?  If the last word fragment is larger than
-                ;; the current string then we will have to rebuild the list
-                ;; later.
-                (not (string-match
-                      (concat "^" ispell-lookup-last-word) string)))))
-
-         completion)
-
-    ;; Check for perfect completion already.  That is, maybe the user has hit
-    ;; M-x ispell-complete-word one too many times?
-    (if (string-equal string "")
-        (if (string-equal (concat ispell-lookup-last-word " ")
-                          (buffer-substring
-                           (save-excursion (forward-word -1) (point)) (point)))
-            (error "Perfect match already")
-          (error "No word fragment at point")))
-
-    ;; Create list of words from system dictionary starting with `string' if
-    ;; new string and not continuing from a previous interior fragment search.
-    (if (and (not continuing-an-interior-frag-p) new-unique-string-p)
-        (setq ispell-lookup-completions-alist
-              (ispell-lookup-build-list string regexp)))
-
-    ;; Check for a completion of `string' in the list and store `string' and
-    ;; other variables for the next call.
-    (setq completion (try-completion prefix ispell-lookup-completions-alist)
-          ispell-lookup-last-word string
-          ispell-lookup-last-interior-p interior-frag
-          ispell-lookup-last-bow bow)
-
-    ;; Test the completion status.
-    (cond
-
-     ;; * Guess is a perfect match.
-     ((eq completion t)
-      (insert " ")
-      (message "Perfect match."))
-
-     ;; * No possibilities.
-     ((null completion)
-      (message "Can't find completion for \"%s\"" string)
-      (beep))
-
-     ;; * Replace string fragment with matched common substring completion.
-     ((and (not (string-equal completion ""))
-           ;; Fold case so a completion list is built when `string' and common
-           ;; substring differ only in case.
-           (let ((case-fold-search t))
-             (not (string-match (concat "^" completion "$") string))))
-      (search-backward string bow)
-      (replace-match completion nil t) ; FIXEDCASE doesn't work? or LITERAL?
-      (message "Proposed unique substring.  Repeat for completions list."))
-
-     ;; * String is a common substring completion already.  Make list.
-     (t
-      (message "Making completion list...")
-      (if (string-equal completion "") (delete-region bow (point)))
-      (let ((list (all-completions prefix ispell-lookup-completions-alist)))
-        (with-output-to-temp-buffer "*Completions*"
-          (display-completion-list list)))
-      (message "Making completion list...done")))))
-
-;;;autoload
-(defun ispell-complete-word-interior-frag ()
-  "Runs `ispell-complete-word' with a non-nil INTERIOR-FRAG.
-A completion list is built for word fragment at point which is assumed to be
-an interior word fragment.  `ispell-have-new-look' should be t."
-  (interactive)
-  (ispell-complete-word t))
-
-;;;; Internal Function.
-
-;;; Build list of words using ispell-look-command from dictionary
-;;; ispell-look-dictionary (if this is a non-nil string).  Look for words
-;;; starting with STRING if ispell-have-new-look is nil or look for REGEXP if
-;;; ispell-have-new-look is t.  Returns result as an alist suitable for use by
-;;; try-completion, all-completions, and completing-read.
-(defun ispell-lookup-build-list (string regexp)
-  (save-excursion
-    (message "Building list...")
-    (set-buffer (get-buffer-create " *ispell look*"))
-    (erase-buffer)
-
-    (if (stringp ispell-look-dictionary)
-        (if ispell-have-new-look
-            (call-process ispell-look-command nil t nil "-fr" regexp
-                          ispell-look-dictionary)
-          (call-process ispell-look-command nil t nil "-f" string
-                        ispell-look-dictionary))
-      (if ispell-have-new-look
-          (call-process ispell-look-command nil t nil "-fr" regexp)
-        (call-process ispell-look-command nil t nil "-f" string)))
-
-    ;; Build list for try-completion and all-completions by storing each line
-    ;; of output starting from bottom of buffer and deleting upwards.
-    (let (list)
-      (goto-char (point-min))
-      (while (not (= (point-min) (point-max)))
-        (end-of-line)
-        (setq list (cons (buffer-substring (point-min) (point)) list))
-        (forward-line)
-        (delete-region (point-min) (point)))
-
-      ;; Clean.
-      (erase-buffer)
-      (message "Building list...done")
-
-      ;; Make the list into an alist and return.
-      (mapcar 'list (nreverse list)))))
-
-;; Return regexp-quote of STRING if STRING is non-empty.
-;; Otherwise return an unmatchable regexp.
-(defun ispell-non-empty-string (string)
-  (if (or (not string) (string-equal string ""))
-      "\\'\\`" ; An unmatchable string if string is null.
-    (regexp-quote string)))
-
-(defcustom ispell-message-cite-regexp "^   \\|^\t"
-  "*Regular expression to match lines cited from one message into another."
-  :type 'regexp
-  :group 'ispell4)
-
-(defcustom ispell-message-text-end
-  (concat "^\\(" (mapconcat (function identity)
-                                '(
-                                  ;; Matches postscript files.
-                                  "%!PS-Adobe-2.0"
-                                  ;; Matches uuencoded text
-                                  "begin [0-9][0-9][0-9] .*\nM.*\nM.*\nM"
-                                  ;; Matches shell files (esp. auto-decoding)
-                                  "#! /bin/sh"
-                                  ;; Matches difference listing
-                                  "diff -c .*\n\\*\\*\\* .*\n--- "
-                                  ;; Matches "--------------------- cut here"
-                                  "[-=]+\\s cut here")
-                                "\\|")
-              "\\)")
-  "*End of text which will be checked in ispell-message.
-If it is a string, limit at first occurrence of that regular expression.
-Otherwise, it must be a function which is called to get the limit."
-  :type '(choice string function)
-  :group 'ispell4)
-
-(defcustom ispell-message-limit (* 100 80)
-  "*Ispell-message will check no more than this number of characters."
-  :type 'integer
-  :group 'ispell4)
-
-;;;autoload
-(defun ispell-message ()
-  "Check the spelling of a mail message or news post.
-Don't check spelling of message headers (except subject) or included messages.
-
-To spell-check whenever a message is sent, include this line in .emacs:
-   (setq news-inews-hook (setq mail-send-hook 'ispell-message))
-
-Or you can bind the function to C-c i in gnus or mail with:
-   (setq mail-mode-hook (setq news-reply-mode-hook
-    (function (lambda () (local-set-key \"\\C-ci\" 'ispell-message)))))"
-  (interactive)
-  (save-excursion
-    (let (non-internal-message
-          (old-case-fold-search case-fold-search)
-          (case-fold-search nil))
-
-      ;; Don't spell-check the headers.
-      (rfc822-goto-eoh)
-      (forward-line 1)
-      (setq non-internal-message (looking-at ""))
-
-      (let* ((cite-regexp               ;Prefix of inserted text
-             (cond
-              ((featurep 'supercite)    ; sc 3.0
-               (concat "\\(" (sc-cite-regexp) "\\)" "\\|"
-                       (ispell-non-empty-string sc-reference-tag-string)))
-              ((featurep 'sc)           ; sc 2.3
-               (concat "\\(" sc-cite-regexp "\\)" "\\|"
-                       (ispell-non-empty-string sc-reference-tag-string)))
-              (non-internal-message     ; Assume nn sent us this message.
-               (concat "In [a-zA-Z.]+ you write:" "\\|"
-                       "In <[^,;&+=]+> [^,;&+=]+ writes:" "\\|"
-                       " *> *"))
-              ((equal major-mode 'news-reply-mode) ;Gnus
-               (concat "In article <" "\\|"
-                       (if mail-yank-prefix
-                           (ispell-non-empty-string mail-yank-prefix)
-                         ispell-message-cite-regexp)))
-              ((boundp 'vm-included-text-prefix) ; VM mail message
-               (concat "[^,;&+=]+ writes:" "\\|"
-                       (ispell-non-empty-string vm-included-text-prefix)
-                       ))
-              ((boundp 'mh-ins-buf-prefix) ; mh mail message
-               (ispell-non-empty-string mh-ins-buf-prefix))
-              (mail-yank-prefix                 ; vanilla mail message.
-               (ispell-non-empty-string mail-yank-prefix))
-              (t ispell-message-cite-regexp)))
-            (continue t)
-            (limit
-             (min
-              (+ (point-min) ispell-message-limit)
-              (point-max)
-              (save-excursion
-                (cond
-                 ((not ispell-message-text-end) (point-max))
-                 ((char-or-string-p ispell-message-text-end)
-                  (if (re-search-forward ispell-message-text-end nil 'end)
-                      (match-beginning 0)
-                    (point-max)))
-                 (t (funcall ispell-message-text-end))))))
-            (search-limit ; Search limit which won't stop in middle of citation
-             (+ limit (length cite-regexp)))
-            )
-        ;; Check the subject
-        (save-excursion
-          (let ((case-fold-search t)
-                (message-begin (point)))
-            (goto-char (point-min))
-            ;; "\\s *" matches newline if subject is empty
-            (if (and (re-search-forward "^Subject:[\t ]*" message-begin t)
-                     (not (looking-at "re\\>")))
-                (setq continue
-                      (ispell-region (- (point) 1)
-                                     (progn
-                                       (end-of-line)
-                                       (while (looking-at "\n[ \t]")
-                                         (end-of-line 2))
-                                       (point))))
-              )))
-
-        ;; Check the body.
-        (while (and (< (point) limit) continue)
-          ;; Skip across text cited from other messages.
-          (while (and (looking-at (concat "^[ \t]*$\\|" cite-regexp))
-                      (< (point) limit))
-            (forward-line 1))
-          (if (< (point) limit)
-              ;; Check the next batch of lines that *aren't* cited.
-              (let ((start (point)))
-                (if (re-search-forward
-                     (concat "^\\(" cite-regexp "\\)") search-limit 'end)
-                    (beginning-of-line))
-                (if (> (point) limit) (goto-char limit))
-                (let ((case-fold-search old-case-fold-search))
-                  (save-excursion
-                    (setq continue (ispell-region (- start 1) (point))))))))))))
-
-(provide 'ispell)
-
-;;; ispell4.el ends here