Pacify recent unused/ignored lexvar warnings

Lexvars with special names like 'ignored' or 'unused' are no longer
treated specially.

* lisp/ansi-color.el (ansi-color-process-output):
* lisp/cus-edit.el (customize-apropos-options):
* lisp/cus-theme.el (customize-create-theme):
* lisp/dired-aux.el (dired-hide-all):
* lisp/emacs-lisp/crm.el (crm--choose-completion-string):
* lisp/emacs-lisp/tabulated-list.el (tabulated-list-revert):
* lisp/ido.el (ido-choose-completion-string):
* lisp/international/mule-diag.el (describe-font-internal):
* lisp/mail/sendmail.el (sendmail-user-agent-compose):
* lisp/progmodes/fortran.el (fortran-uncomment-region):
* lisp/progmodes/prolog.el (prolog-inferior-guess-flavor):
* lisp/progmodes/ruby-mode.el (ruby-indent-line, ruby-indent-exp):
* lisp/url/url.el (url-mm-callback):
* lisp/xwidget.el (xwidget-webkit-history-reload): Prepend an
underscore to unused function parameter names.
* lisp/emacs-lisp/cconv.el (cconv--dummy-var): Remove unused
constant.
* lisp/files.el (hack-local-variables-filter): Remove unused lexvar.

lisp/ansi-color.el

@@ -418,7 +418,7 @@ and it should apply face FACE to the text between BEG and END.")
   (setq ansi-color-for-comint-mode 'filter))
 
 ;;;###autoload
-(defun ansi-color-process-output (ignored)
+(defun ansi-color-process-output (_ignored)
   "Maybe translate SGR control sequences of comint output into text properties.
 
 Depending on variable `ansi-color-for-comint-mode' the comint output is

lisp/cus-edit.el

@@ -1546,7 +1546,7 @@ If TYPE is `groups', include only groups."
      "*Customize Apropos*")))
 
 ;;;###autoload
-(defun customize-apropos-options (regexp &optional ignored)
+(defun customize-apropos-options (regexp &optional _ignored)
   "Customize all loaded customizable options matching REGEXP."
   (interactive (list (apropos-read-pattern "options")))
   (customize-apropos regexp 'options))

lisp/cus-theme.el

@@ -142,7 +142,7 @@ remove them from your saved Custom file.\n\n")
     (widget-create 'push-button
 		   :tag " Revert "
 		   :help-echo "Revert this buffer to its original state."
-		   :action (lambda (&rest ignored) (revert-buffer)))
+                   :action (lambda (&rest _ignored) (revert-buffer)))
 
     (widget-insert "\n\nTheme name : ")
     (setq custom-theme-name

lisp/dired-aux.el

@@ -3478,7 +3478,7 @@ Use \\[dired-hide-all] to (un)hide all directories."
       (dired-next-subdir 1 t))))
 
 ;;;###autoload
-(defun dired-hide-all (&optional ignored)
+(defun dired-hide-all (&optional _ignored)
   "Hide all subdirectories, leaving only their header lines.
 If there is already something hidden, make everything visible again.
 Use \\[dired-hide-subdir] to (un)hide a particular subdirectory."

lisp/emacs-lisp/cconv.el

@@ -130,8 +130,6 @@ Returns a form where all lambdas don't have any free variables."
     (prog1 (cconv-convert form nil nil) ; Env initially empty.
       (cl-assert (null cconv-freevars-alist)))))
 
-(defconst cconv--dummy-var (make-symbol "ignored"))
-
 (defun cconv--set-diff (s1 s2)
   "Return elements of set S1 that are not in set S2."
   (let ((res '()))

lisp/emacs-lisp/crm.el

@@ -201,7 +201,7 @@ This function is modeled after `minibuffer-complete-and-exit'."
     (if doexit (exit-minibuffer))))
 
 (defun crm--choose-completion-string (choice buffer base-position
-                                             &rest ignored)
+                                             &rest _ignored)
   "Completion string chooser for `completing-read-multiple'.
 This is called from `choose-completion-string-functions'.
 It replaces the string that is currently being completed, without

lisp/emacs-lisp/tabulated-list.el

@@ -374,7 +374,7 @@ Optional arg POS is a buffer position where to look for a fake header;
 defaults to `point-min'."
   (overlays-at (or pos (point-min))))
 
-(defun tabulated-list-revert (&rest ignored)
+(defun tabulated-list-revert (&rest _ignored)
   "The `revert-buffer-function' for `tabulated-list-mode'.
 It runs `tabulated-list-revert-hook', then calls `tabulated-list-print'."
   (interactive)

lisp/files.el

@@ -3863,7 +3863,7 @@ If these settings come from directory-local variables, then
 DIR-NAME is the name of the associated directory.  Otherwise it is nil."
   ;; Find those variables that we may want to save to
   ;; `safe-local-variable-values'.
-  (let (all-vars risky-vars unsafe-vars ignored)
+  (let (all-vars risky-vars unsafe-vars)
     (dolist (elt variables)
       (let ((var (car elt))
 	    (val (cdr elt)))

lisp/ido.el

@@ -3915,7 +3915,7 @@ If `ido-change-word-sub' cannot be found in WORD, return nil."
   "Return dotted pair (RES . 1)."
   (cons res 1))
 
-(defun ido-choose-completion-string (choice &rest ignored)
+(defun ido-choose-completion-string (choice &rest _ignored)
   (when (ido-active)
     ;; Insert the completion into the buffer where completion was requested.
     (and ido-completion-buffer

lisp/international/mule-diag.el

@@ -812,7 +812,7 @@ but still contains full information about each coding system."
 
 (declare-function font-info "font.c" (name &optional frame))
 
-(defun describe-font-internal (font-info &optional ignored)
+(defun describe-font-internal (font-info &optional _ignored)
   "Print information about a font in FONT-INFO.
 The IGNORED argument is ignored."
   (print-list "name (opened by):" (aref font-info 0))

lisp/mail/sendmail.el

@@ -550,10 +550,10 @@ This also saves the value of `send-mail-function' via Customize."
   #'mail-send-and-exit)
 
 ;;;###autoload
-(defun sendmail-user-agent-compose (&optional to subject other-headers
-				    continue switch-function yank-action
-				    send-actions return-action
-				    &rest ignored)
+(defun sendmail-user-agent-compose ( &optional to subject other-headers
+                                     continue switch-function yank-action
+                                     send-actions return-action
+                                     &rest _ignored )
   (if switch-function
       (funcall switch-function "*mail*"))
   (let ((cc (cdr (assoc-string "cc" other-headers t)))

lisp/progmodes/fortran.el

@@ -957,7 +957,7 @@ With non-nil ARG, uncomments the region."
     (set-marker save-point nil)))
 
 ;; uncomment-region calls this with 3 args.
-(defun fortran-uncomment-region (start end &optional ignored)
+(defun fortran-uncomment-region (start end &optional _ignored)
   "Uncomment every line in the region."
   (fortran-comment-region start end t))
 

lisp/progmodes/prolog.el

@@ -1311,7 +1311,7 @@ With prefix argument ARG, restart the Prolog process if running before."
     (prolog-mode-variables)
     ))
 
-(defun prolog-inferior-guess-flavor (&optional ignored)
+(defun prolog-inferior-guess-flavor (&optional _ignored)
   (setq-local prolog-system
               (when (or (numberp prolog-system) (markerp prolog-system))
                 (save-excursion

lisp/progmodes/ruby-mode.el

@@ -849,7 +849,7 @@ The style of the comment is controlled by `ruby-encoding-magic-comment-style'."
     (back-to-indentation)
     (current-column)))
 
-(defun ruby-indent-line (&optional ignored)
+(defun ruby-indent-line (&optional _ignored)
   "Correct the indentation of the current Ruby line."
   (interactive)
   (ruby-indent-to (ruby-calculate-indent)))
@@ -1576,7 +1576,7 @@ With ARG, do it many times.  Negative ARG means move forward."
         ((error)))
       i))))
 
-(defun ruby-indent-exp (&optional ignored)
+(defun ruby-indent-exp (&optional _ignored)
   "Indent each line in the balanced expression following the point."
   (interactive "*P")
   (let ((here (point-marker)) start top column (nest t))

lisp/url/url.el

@@ -293,7 +293,7 @@ how long to wait for a response before giving up."
 (declare-function mm-display-part "mm-decode"
 		  (handle &optional no-default force))
 
-(defun url-mm-callback (&rest ignored)
+(defun url-mm-callback (&rest _ignored)
   (let ((handle (mm-dissect-buffer t)))
     (url-mark-buffer-as-dead (current-buffer))
     (with-current-buffer

lisp/xwidget.el

@@ -1198,7 +1198,7 @@ Press \\<xwidget-webkit-isearch-mode-map>\\[xwidget-webkit-isearch-exit] to exit
     (xwidget-webkit-goto-history xwidget-webkit-history--session id))
   (xwidget-webkit-history-reload))
 
-(defun xwidget-webkit-history-reload (&rest ignored)
+(defun xwidget-webkit-history-reload (&rest _ignored)
   "Reload the current history buffer."
   (interactive)
   (setq tabulated-list-entries nil)