* lisp/dired-x.el:

* lisp/net/ange-ftp.el:
* lisp/net/browse-url.el:
* lisp/net/dbus.el:
* lisp/net/eudc.el:
* lisp/net/eudcb-ldap.el:
* lisp/net/eww.el:
* lisp/net/imap.el:
* lisp/printing.el:
* lisp/vc/ediff-diff.el:
* lisp/vc/ediff-init.el:
* lisp/vc/ediff-merg.el:
* lisp/vc/ediff-mult.el:
* lisp/vc/ediff-util.el:
* lisp/vc/ediff-wind.el:
* lisp/vc/ediff.el:
* lisp/vc/emerge.el:
* lisp/vc/pcvs.el:
* vc/vc-annotate.el: Prefix unused arguments with `_' to silence
byte compiler.  Remove some unused let-bound variables.

19 files changed, 114 insertions, 94 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 9633fc29c30..9619f9fc865 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,26 @@
+2013-09-05  Daniel Hackney  <dan@haxney.org>
+
+        * dired-x.el:
+        * net/ange-ftp.el:
+        * net/browse-url.el:
+        * net/dbus.el:
+        * net/eudc.el:
+        * net/eudcb-ldap.el:
+        * net/eww.el:
+        * net/imap.el:
+        * printing.el:
+        * vc/ediff-diff.el:
+        * vc/ediff-init.el:
+        * vc/ediff-merg.el:
+        * vc/ediff-mult.el:
+        * vc/ediff-util.el:
+        * vc/ediff-wind.el:
+        * vc/ediff.el:
+        * vc/emerge.el:
+        * vc/pcvs.el:
+        * vc/vc-annotate.el: Prefix unused arguments with `_' to silence
+        byte compiler.  Remove some unused let-bound variables.
+
 2013-09-05  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * emacs-lisp/cconv.el: Use `car-safe' rather than `car' to access
diff --git a/lisp/dired-x.el b/lisp/dired-x.el
index 0c432593909..3527a3fc756 100644
--- a/lisp/dired-x.el
+++ b/lisp/dired-x.el
@@ -1185,7 +1185,7 @@ results in
           (setq count (1+ count)
                 start (1+ start)))
         ;; ... and prepend a "../" for each slash found:
-        (dotimes (_n count)
+        (dotimes (n count)
           (setq name1 (concat "../" name1)))))
     (make-symbolic-link
      (directory-file-name name1)        ; must not link to foo/
diff --git a/lisp/net/ange-ftp.el b/lisp/net/ange-ftp.el
index 177fdaca150..67c74f88250 100644
--- a/lisp/net/ange-ftp.el
+++ b/lisp/net/ange-ftp.el
@@ -3733,7 +3733,7 @@ so return the size on the remote host exactly. See RFC 3659."
 ;; next part of copying routine.
 (defun ange-ftp-cf1 (result line
                             filename newname binary msg
-                            f-parsed f-host f-user f-name f-abbr
+                            f-parsed f-host f-user _f-name f-abbr
                             t-parsed t-host t-user t-name t-abbr
                             temp1 temp2 cont nowait)
   (if line
@@ -3835,7 +3835,7 @@ so return the size on the remote host exactly. See RFC 3659."
 
 (defun ange-ftp-copy-file (filename newname &optional ok-if-already-exists
                                     keep-date preserve-uid-gid
-                                    preserve-selinux-context)
+                                    _preserve-selinux-context)
   (interactive "fCopy file: \nFCopy %s to file: \np")
   (ange-ftp-copy-file-internal filename
                                newname
@@ -4200,7 +4200,7 @@ directory, so that Emacs will know its current contents."
         (while (and tryfiles (not copy))
           (catch 'ftp-error
             (let ((ange-ftp-waiting-flag t))
-              (condition-case error
+              (condition-case _error
                   (setq copy (ange-ftp-file-local-copy (car tryfiles)))
                 (ftp-error nil))))
           (setq tryfiles (cdr tryfiles)))
@@ -4214,7 +4214,7 @@ directory, so that Emacs will know its current contents."
     (ange-ftp-real-load file noerror nomessage nosuffix)))
 
 ;; Calculate default-unhandled-directory for a given ange-ftp buffer.
-(defun ange-ftp-unhandled-file-name-directory (filename)
+(defun ange-ftp-unhandled-file-name-directory (_filename)
   nil)
 
 
@@ -4605,7 +4605,6 @@ NEWNAME should be the name to give the new compressed or uncompressed file.")
 (defun ange-ftp-shell-command (command &optional output-buffer error-buffer)
   (let* ((parsed (ange-ftp-ftp-name default-directory))
          (host (nth 0 parsed))
-         (user (nth 1 parsed))
          (name (nth 2 parsed)))
     (if (not parsed)
         (ange-ftp-real-shell-command command output-buffer error-buffer)
@@ -5176,7 +5175,7 @@ Other orders of $ and _ seem to all work just fine.")
                     ;; versions left. If not, then delete the
                     ;; root entry.
                     (maphash
-                     (lambda (key val)
+                     (lambda (key _val)
                        (and (string-match regexp key)
                             (setq versions t)))
                      files)
@@ -5358,7 +5357,7 @@ Other orders of $ and _ seem to all work just fine.")
 ;; compressed files. Instead, we turn "FILE.TYPE" into
 ;; "FILE.TYPE-Z". Hope that this is a reasonable thing to do.
 
-(defun ange-ftp-vms-make-compressed-filename (name &optional reverse)
+(defun ange-ftp-vms-make-compressed-filename (name &optional _reverse)
   (cond
    ((string-match "-Z;[0-9]+\\'" name)
     (list nil (substring name 0 (match-beginning 0))))
@@ -5399,7 +5398,7 @@ Other orders of $ and _ seem to all work just fine.")
 ;;        (cons '(vms . ange-ftp-dired-vms-ls-trim)
 ;;              ange-ftp-dired-ls-trim-alist)))
 
-(defun ange-ftp-vms-sans-version (name &rest args)
+(defun ange-ftp-vms-sans-version (name &rest _args)
   (save-match-data
     (if (string-match ";[0-9]+\\'" name)
         (substring name 0 (match-beginning 0))
@@ -5920,7 +5919,7 @@ Other orders of $ and _ seem to all work just fine.")
 ;;        (cons '(cms . ange-ftp-dired-cms-move-to-end-of-filename)
 ;;              ange-ftp-dired-move-to-end-of-filename-alist)))
 
-(defun ange-ftp-cms-make-compressed-filename (name &optional reverse)
+(defun ange-ftp-cms-make-compressed-filename (name &optional _reverse)
   (if (string-match "-Z\\'" name)
       (list nil (substring name 0 -2))
     (list t (concat name "-Z"))))
diff --git a/lisp/net/browse-url.el b/lisp/net/browse-url.el
index 70173dbc0b3..ff654f23747 100644
--- a/lisp/net/browse-url.el
+++ b/lisp/net/browse-url.el
@@ -868,7 +868,7 @@ to use."
 (defvar dos-windows-version)
 (declare-function w32-shell-execute "w32fns.c")    ;; Defined in C.
 
-(defun browse-url-default-windows-browser (url &optional new-window)
+(defun browse-url-default-windows-browser (url &optional _new-window)
   (interactive (browse-url-interactive-arg "URL: "))
   (cond ((eq system-type 'ms-dos)
          (if dos-windows-version
@@ -878,7 +878,7 @@ to use."
          (call-process "cygstart" nil nil nil url))
         (t (w32-shell-execute "open" url))))
 
-(defun browse-url-default-macosx-browser (url &optional new-window)
+(defun browse-url-default-macosx-browser (url &optional _new-window)
   (interactive (browse-url-interactive-arg "URL: "))
   (start-process (concat "open " url) nil "open" url))
 
@@ -933,7 +933,7 @@ used instead of `browse-url-new-window-flag'."
     ((executable-find browse-url-xterm-program) 'browse-url-text-xterm)
     ((locate-library "w3") 'browse-url-w3)
     (t
-     (lambda (&rest ignore) (error "No usable browser found"))))
+     (lambda (&rest _ignore) (error "No usable browser found"))))
    url args))
 
 (defun browse-url-can-use-xdg-open ()
@@ -1163,7 +1163,7 @@ URL in a new window."
                (append browse-url-firefox-startup-arguments (list url))))))
 
 ;;;###autoload
-(defun browse-url-chromium (url &optional new-window)
+(defun browse-url-chromium (url &optional _new-window)
   "Ask the Chromium WWW browser to load URL.
 Default to the URL around or before point.  The strings in
 variable `browse-url-chromium-arguments' are also passed to
@@ -1272,7 +1272,7 @@ used instead of `browse-url-new-window-flag'."
 (defvar url-handler-regexp)
 
 ;;;###autoload
-(defun browse-url-emacs (url &optional new-window)
+(defun browse-url-emacs (url &optional _new-window)
   "Ask Emacs to load URL into a buffer and show it in another window."
   (interactive (browse-url-interactive-arg "URL: "))
   (require 'url-handlers)
@@ -1413,7 +1413,7 @@ used instead of `browse-url-new-window-flag'."
     (w3-fetch url)))
 
 ;;;###autoload
-(defun browse-url-w3-gnudoit (url &optional new-window)
+(defun browse-url-w3-gnudoit (url &optional _new-window)
   ;; new-window ignored
   "Ask another Emacs running gnuserv to load the URL using the W3 browser.
 The `browse-url-gnudoit-program' program is used with options given by
@@ -1428,7 +1428,7 @@ The `browse-url-gnudoit-program' program is used with options given by
 ;; --- Lynx in an xterm ---
 
 ;;;###autoload
-(defun browse-url-text-xterm (url &optional new-window)
+(defun browse-url-text-xterm (url &optional _new-window)
   ;; new-window ignored
   "Ask a text browser to load URL.
 URL defaults to the URL around or before point.
@@ -1492,7 +1492,7 @@ used instead of `browse-url-new-window-flag'."
            (get-buffer-process buf)
            ;; Don't leave around a dead one (especially because of its
            ;; munged keymap.)
-           (lambda (process event)
+           (lambda (process _event)
              (if (not (memq (process-status process) '(run stop)))
                  (let ((buf (process-buffer process)))
                    (if buf (kill-buffer buf)))))))
@@ -1565,7 +1565,7 @@ used instead of `browse-url-new-window-flag'."
 ;; --- Random browser ---
 
 ;;;###autoload
-(defun browse-url-generic (url &optional new-window)
+(defun browse-url-generic (url &optional _new-window)
   ;; new-window ignored
   "Ask the WWW browser defined by `browse-url-generic-program' to load URL.
 Default to the URL around or before point.  A fresh copy of the
@@ -1580,7 +1580,7 @@ don't offer a form of remote control."
          (append browse-url-generic-args (list url))))
 
 ;;;###autoload
-(defun browse-url-kde (url &optional new-window)
+(defun browse-url-kde (url &optional _new-window)
   "Ask the KDE WWW browser to load URL.
 Default to the URL around or before point."
   (interactive (browse-url-interactive-arg "KDE URL: "))
diff --git a/lisp/net/dbus.el b/lisp/net/dbus.el
index 0e9c4fc5c76..a05452c430c 100644
--- a/lisp/net/dbus.el
+++ b/lisp/net/dbus.el
@@ -1609,7 +1609,6 @@ and \"org.freedesktop.DBus.Properties.GetAll\", which is slow."
 It will be registered for all objects created by `dbus-register-method'."
   (let* ((last-input-event last-input-event)
          (bus (dbus-event-bus-name last-input-event))
-         (service (dbus-event-service-name last-input-event))
          (path (dbus-event-path-name last-input-event)))
     ;; "GetManagedObjects" returns "a{oa{sa{sv}}}".
     (let (interfaces result)
@@ -1625,8 +1624,7 @@ It will be registered for all objects created by `dbus-register-method'."
       ;; Check all registered object paths.
       (maphash
        (lambda (key val)
-         (let ((object (or (nth 2 (car-safe val)) ""))
-               (interface (nth 2 key)))
+         (let ((object (or (nth 2 (car-safe val)) "")))
            (when (and (equal (butlast key 2) (list :method bus))
                       (string-prefix-p path object))
              (dolist (interface (cons (nth 2 key) interfaces))
diff --git a/lisp/net/eudc.el b/lisp/net/eudc.el
index ef09267f854..c474ac9380d 100644
--- a/lisp/net/eudc.el
+++ b/lisp/net/eudc.el
@@ -518,12 +518,12 @@ otherwise they are formatted according to `eudc-user-attribute-names-alist'."
            precords))
         (insert "\n")
         (widget-create 'push-button
-                       :notify (lambda (&rest ignore)
+                       :notify (lambda (&rest _ignore)
                                  (eudc-query-form))
                        "New query")
         (widget-insert " ")
         (widget-create 'push-button
-                       :notify (lambda (&rest ignore)
+                       :notify (lambda (&rest _ignore)
                                  (kill-this-buffer))
                        "Quit")
         (eudc-mode)
@@ -995,17 +995,17 @@ queries the server for the existing fields and displays a corresponding form."
           fields)
     (widget-insert "\n\n")
     (widget-create 'push-button
-                   :notify (lambda (&rest ignore)
+                   :notify (lambda (&rest _ignore)
                              (eudc-process-form))
                    "Query Server")
     (widget-insert " ")
     (widget-create 'push-button
-                   :notify (lambda (&rest ignore)
+                   :notify (lambda (&rest _ignore)
                              (eudc-query-form))
                    "Reset Form")
     (widget-insert " ")
     (widget-create 'push-button
-                   :notify (lambda (&rest ignore)
+                   :notify (lambda (&rest _ignore)
                              (kill-this-buffer))
                    "Quit")
     (goto-char pt)
diff --git a/lisp/net/eudcb-ldap.el b/lisp/net/eudcb-ldap.el
index d0ba47ad753..a678ec3ab42 100644
--- a/lisp/net/eudcb-ldap.el
+++ b/lisp/net/eudcb-ldap.el
@@ -136,7 +136,7 @@ RETURN-ATTRS is a list of attributes to return, defaulting to
          result))
     final-result))
 
-(defun eudc-ldap-get-field-list (dummy &optional objectclass)
+(defun eudc-ldap-get-field-list (_dummy &optional objectclass)
   "Return a list of valid attribute names for the current server.
 OBJECTCLASS is the LDAP object class for which the valid
 attribute names are returned. Default to `person'"
diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 8b4dd2eed5f..6cf4ff2c9bf 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -381,7 +381,7 @@ word(s) will be searched for via `eww-search-prefix'."
         eww-history))
 
 ;;;###autoload
-(defun eww-browse-url (url &optional new-window)
+(defun eww-browse-url (url &optional _new-window)
   (when (and (equal major-mode 'eww-mode)
              eww-current-url)
     (eww-save-history))
diff --git a/lisp/net/imap.el b/lisp/net/imap.el
index 9584ceb24d0..256af723861 100644
--- a/lisp/net/imap.el
+++ b/lisp/net/imap.el
@@ -139,7 +139,7 @@
 (eval-when-compile (require 'cl))
 (eval-and-compile
   ;; For Emacs <22.2 and XEmacs.
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest r)))
+  (unless (fboundp 'declare-function) (defmacro declare-function (&rest _r)))
   (autoload 'starttls-open-stream "starttls")
   (autoload 'starttls-negotiate "starttls")
   (autoload 'sasl-find-mechanism "sasl")
@@ -661,7 +661,7 @@ sure of changing the value of `foo'."
               nil)))))
     done))
 
-(defun imap-ssl-p (buffer)
+(defun imap-ssl-p (_buffer)
   nil)
 
 (defun imap-ssl-open (name buffer server port)
@@ -711,7 +711,7 @@ sure of changing the value of `foo'."
       (message "imap: Opening SSL connection with `%s'...failed" cmd)
       nil)))
 
-(defun imap-tls-p (buffer)
+(defun imap-tls-p (_buffer)
   nil)
 
 (defun imap-tls-open (name buffer server port)
@@ -738,7 +738,7 @@ sure of changing the value of `foo'."
       (when (memq (process-status process) '(open run))
         process))))
 
-(defun imap-network-p (buffer)
+(defun imap-network-p (_buffer)
   t)
 
 (defun imap-network-open (name buffer server port)
@@ -757,7 +757,7 @@ sure of changing the value of `foo'."
       (when (memq (process-status process) '(open run))
         process))))
 
-(defun imap-shell-p (buffer)
+(defun imap-shell-p (_buffer)
   nil)
 
 (defun imap-shell-open (name buffer server port)
@@ -881,10 +881,10 @@ t if it successfully authenticates, nil otherwise."
       ;;                       passwd nil))))
       ret)))
 
-(defun imap-gssapi-auth-p (buffer)
+(defun imap-gssapi-auth-p (_buffer)
   (eq imap-stream 'gssapi))
 
-(defun imap-gssapi-auth (buffer)
+(defun imap-gssapi-auth (_buffer)
   (message "imap: Authenticating using GSSAPI...%s"
            (if (eq imap-stream 'gssapi) "done" "failed"))
   (eq imap-stream 'gssapi))
@@ -893,7 +893,7 @@ t if it successfully authenticates, nil otherwise."
   (and (imap-capability 'AUTH=KERBEROS_V4 buffer)
        (eq imap-stream 'kerberos4)))
 
-(defun imap-kerberos4-auth (buffer)
+(defun imap-kerberos4-auth (_buffer)
   (message "imap: Authenticating using Kerberos 4...%s"
            (if (eq imap-stream 'kerberos4) "done" "failed"))
   (eq imap-stream 'kerberos4))
@@ -947,7 +947,7 @@ t if it successfully authenticates, nil otherwise."
                                                 (imap-quote-specials passwd)
                                                 "\""))))))
 
-(defun imap-anonymous-p (buffer)
+(defun imap-anonymous-p (_buffer)
   t)
 
 (defun imap-anonymous-auth (buffer)
@@ -1838,7 +1838,7 @@ See `imap-enable-exchange-bug-workaround'."
             (and (imap-fetch-safe '("*" . "*:*") "UID")
                  (list (imap-mailbox-get-1 'uidvalidity mailbox)
                        (apply 'max (imap-message-map
-                                    (lambda (uid prop) uid) 'UID))))
+                                    (lambda (uid _prop) uid) 'UID))))
           (if old-mailbox
               (imap-mailbox-select old-mailbox (eq state 'examine))
             (imap-mailbox-unselect)))))))
@@ -1884,7 +1884,7 @@ first element.  The rest of list contains the saved articles' UIDs."
             (and (imap-fetch-safe '("*" . "*:*") "UID")
                  (list (imap-mailbox-get-1 'uidvalidity mailbox)
                        (apply 'max (imap-message-map
-                                    (lambda (uid prop) uid) 'UID))))
+                                    (lambda (uid _prop) uid) 'UID))))
           (if old-mailbox
               (imap-mailbox-select old-mailbox (eq state 'examine))
             (imap-mailbox-unselect)))))))
@@ -1893,7 +1893,7 @@ first element.  The rest of list contains the saved articles' UIDs."
   (with-current-buffer (or buffer (current-buffer))
     (imap-message-appenduid-1 (imap-utf7-encode mailbox))))
 
-(defun imap-message-append (mailbox article &optional flags date-time buffer)
+(defun imap-message-append (mailbox article &optional _flags _date-time buffer)
   "Append ARTICLE (a buffer) to MAILBOX on server in BUFFER.
 FLAGS and DATE-TIME is currently not used.  Return a cons holding
 uidvalidity of MAILBOX and UID the newly created article got, or nil
diff --git a/lisp/printing.el b/lisp/printing.el
index 2c807b078f5..e814c3a06f2 100644
--- a/lisp/printing.el
+++ b/lisp/printing.el
@@ -4627,21 +4627,21 @@ bottom."
 
 
 ;;;###autoload
-(defun pr-customize (&rest ignore)
+(defun pr-customize (&rest _ignore)
   "Customization of the `printing' group."
   (interactive)
   (customize-group 'printing))
 
 
 ;;;###autoload
-(defun lpr-customize (&rest ignore)
+(defun lpr-customize (&rest _ignore)
   "Customization of the `lpr' group."
   (interactive)
   (customize-group 'lpr))
 
 
 ;;;###autoload
-(defun pr-help (&rest ignore)
+(defun pr-help (&rest _ignore)
   "Help for the printing package."
   (interactive)
   (pr-show-setup pr-help-message "*Printing Help*"))
@@ -4675,21 +4675,21 @@ bottom."
 
 
 ;;;###autoload
-(defun pr-show-ps-setup (&rest ignore)
+(defun pr-show-ps-setup (&rest _ignore)
   "Show current ps-print settings."
   (interactive)
   (pr-show-setup (ps-setup) "*PS Setup*"))
 
 
 ;;;###autoload
-(defun pr-show-pr-setup (&rest ignore)
+(defun pr-show-pr-setup (&rest _ignore)
   "Show current printing settings."
   (interactive)
   (pr-show-setup (pr-setup) "*PR Setup*"))
 
 
 ;;;###autoload
-(defun pr-show-lpr-setup (&rest ignore)
+(defun pr-show-lpr-setup (&rest _ignore)
   "Show current lpr settings."
   (interactive)
   (pr-show-setup (lpr-setup) "*LPR Setup*"))
@@ -6125,7 +6125,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
        (pr-insert-checkbox
         "\n               "
         'pr-i-region
-        #'(lambda (widget &rest ignore)
+        #'(lambda (widget &rest _ignore)
             (let ((region-p (pr-interface-save
                              (ps-mark-active-p))))
               (cond ((null (widget-value widget)) ; widget is nil
@@ -6146,7 +6146,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
        (pr-insert-checkbox
         "    "
         'pr-i-mode
-        #'(lambda (widget &rest ignore)
+        #'(lambda (widget &rest _ignore)
             (let ((mode-p (pr-interface-save
                            (pr-mode-alist-p))))
               (cond
@@ -6182,7 +6182,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   (widget-create 'regexp
                  :size 58
                  :format "\n      File Regexp : %v\n"
-                 :notify (lambda (widget &rest ignore)
+                 :notify (lambda (widget &rest _ignore)
                            (setq pr-i-regexp (widget-value widget)))
                  pr-i-regexp)
   ;;    1b. Directory: List Directory Entry
@@ -6222,7 +6222,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
        (pr-insert-checkbox
         "    "
         'pr-i-despool
-        #'(lambda (widget &rest ignore)
+        #'(lambda (widget &rest _ignore)
             (if pr-spool-p
                 (setq pr-i-despool (not pr-i-despool))
               (ding)
@@ -6259,7 +6259,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
    'integer
    :size 3
    :format "\n  N-Up : %v"
-   :notify (lambda (widget &rest ignore)
+   :notify (lambda (widget &rest _ignore)
              (let ((value (if (string= (widget-apply widget :value-get) "")
                               0
                             (widget-value widget))))
@@ -6288,7 +6288,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   ;; 4. Settings:
   ;; 4. Settings: Landscape             Auto Region    Verbose
   (pr-insert-checkbox "\n\n  " 'ps-landscape-mode
-                      #'(lambda (&rest ignore)
+                      #'(lambda (&rest _ignore)
                           (setq ps-landscape-mode (not ps-landscape-mode)
                                 pr-file-landscape ps-landscape-mode))
                       " Landscape             ")
@@ -6310,7 +6310,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   (pr-insert-toggle 'ps-zebra-stripes " Zebra Stripes")
   (pr-insert-checkbox "         "
                       'pr-spool-p
-                      #'(lambda (&rest ignore)
+                      #'(lambda (&rest _ignore)
                           (setq pr-spool-p (not pr-spool-p))
                           (unless pr-spool-p
                             (setq pr-i-despool nil)
@@ -6320,7 +6320,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   ;; 4. Settings: Duplex                Print with faces
   (pr-insert-checkbox "\n  "
                       'ps-spool-duplex
-                      #'(lambda (&rest ignore)
+                      #'(lambda (&rest _ignore)
                           (setq ps-spool-duplex (not ps-spool-duplex)
                                 pr-file-duplex  ps-spool-duplex))
                       " Duplex                ")
@@ -6329,7 +6329,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   ;; 4. Settings: Tumble                Print via Ghostscript
   (pr-insert-checkbox "\n  "
                       'ps-spool-tumble
-                      #'(lambda (&rest ignore)
+                      #'(lambda (&rest _ignore)
                           (setq ps-spool-tumble (not ps-spool-tumble)
                                 pr-file-tumble  ps-spool-tumble))
                       " Tumble                ")
@@ -6352,7 +6352,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   ;; 5. Customize:
   (pr-insert-italic "\n\nCustomize     :   " 2 11)
   (pr-insert-button 'pr-customize "printing" "   ")
-  (pr-insert-button #'(lambda (&rest ignore) (ps-print-customize))
+  (pr-insert-button #'(lambda (&rest _ignore) (ps-print-customize))
                     "ps-print" "   ")
   (pr-insert-button 'lpr-customize "lpr"))
 
@@ -6374,7 +6374,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   (pr-insert-button 'pr-kill-help "Kill All Printing Help Buffer"))
 
 
-(defun pr-kill-help (&rest ignore)
+(defun pr-kill-help (&rest _ignore)
   "Kill all printing help buffer."
   (interactive)
   (let ((help '("*Printing Interface Help*" "*Printing Help*"
@@ -6388,20 +6388,20 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
   (recenter (- (window-height) 2)))
 
 
-(defun pr-interface-quit (&rest ignore)
+(defun pr-interface-quit (&rest _ignore)
   "Kill the printing buffer interface and quit."
   (interactive)
   (kill-buffer pr-buffer-name)
   (set-window-configuration pr-i-window-configuration))
 
 
-(defun pr-interface-help (&rest ignore)
+(defun pr-interface-help (&rest _ignore)
   "printing buffer interface help."
   (interactive)
   (pr-show-setup pr-interface-help-message "*Printing Interface Help*"))
 
 
-(defun pr-interface-txt-print (&rest ignore)
+(defun pr-interface-txt-print (&rest _ignore)
   "Print using lpr package."
   (interactive)
   (condition-case data
@@ -6433,7 +6433,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
      (message "%s" (error-message-string data)))))
 
 
-(defun pr-interface-printify (&rest ignore)
+(defun pr-interface-printify (&rest _ignore)
   "Printify a buffer."
   (interactive)
   (condition-case data
@@ -6458,7 +6458,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
      (message "%s" (error-message-string data)))))
 
 
-(defun pr-interface-ps-print (&rest ignore)
+(defun pr-interface-ps-print (&rest _ignore)
   "Print using ps-print package."
   (interactive)
   (pr-interface-ps 'pr-despool-ps-print 'pr-ps-directory-ps-print
@@ -6467,7 +6467,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
                    'pr-ps-buffer-ps-print))
 
 
-(defun pr-interface-preview (&rest ignore)
+(defun pr-interface-preview (&rest _ignore)
   "Preview a PostScript file."
   (interactive)
   (pr-interface-ps 'pr-despool-preview 'pr-ps-directory-preview
@@ -6548,7 +6548,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
       (error "Please specify be a readable directory")))
 
 
-(defun pr-interface-directory (widget &rest ignore)
+(defun pr-interface-directory (widget &rest _ignore)
   (and pr-buffer-verbose
        (message "You can use M-TAB or ESC TAB for file completion"))
   (let ((dir (widget-value widget)))
@@ -6557,7 +6557,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
          (setq pr-i-directory dir))))
 
 
-(defun pr-interface-infile (widget &rest ignore)
+(defun pr-interface-infile (widget &rest _ignore)
   (and pr-buffer-verbose
        (message "You can use M-TAB or ESC TAB for file completion"))
   (let ((file (widget-value widget)))
@@ -6566,7 +6566,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
          (setq pr-i-ps-file file))))
 
 
-(defun pr-interface-outfile (widget &rest ignore)
+(defun pr-interface-outfile (widget &rest _ignore)
   (setq pr-i-answer-yes nil)
   (and pr-buffer-verbose
        (message "You can use M-TAB or ESC TAB for file completion"))
@@ -6602,7 +6602,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
 
 (defun pr-insert-toggle (var-sym label)
   (widget-create 'checkbox
-                 :notify `(lambda (&rest ignore)
+                 :notify `(lambda (&rest _ignore)
                             (setq ,var-sym (not ,var-sym)))
                  (symbol-value var-sym))
   (widget-insert label))
@@ -6623,7 +6623,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
                         :format "%v"
                         :inline t
                         :value ,var-sym
-                        :notify (lambda (widget &rest ignore)
+                        :notify (lambda (widget &rest _ignore)
                                   (setq ,var-sym (widget-value widget))
                                   ,@body)
                         :void '(choice-item :format "%[%t%]"
@@ -6639,7 +6639,7 @@ COMMAND.exe, COMMAND.bat and COMMAND.com in this order."
                      'radio-button
                      :format "  %[%v%]"
                      :value (eq ,var-sym (quote ,sym))
-                     :notify (lambda (&rest ignore)
+                     :notify (lambda (&rest _ignore)
                                (setq ,var-sym (quote ,sym))
                                (pr-update-radio-button (quote ,var-sym)))))))
     (put var-sym 'pr-widget-list (cons (cons wid sym) wid-list))))
diff --git a/lisp/vc/ediff-diff.el b/lisp/vc/ediff-diff.el
index 3e64250d1a7..3f0ef3a7a61 100644
--- a/lisp/vc/ediff-diff.el
+++ b/lisp/vc/ediff-diff.el
@@ -211,7 +211,7 @@ one optional arguments, diff-number to refine.")
 ;; ediff-setup-diff-regions is called via a funcall to
 ;; ediff-setup-diff-regions-function, which can also have the value
 ;; ediff-setup-diff-regions3, which takes 4 arguments.
-(defun ediff-setup-diff-regions (file-A file-B file-C)
+(defun ediff-setup-diff-regions (file-A file-B _file-C)
   ;; looking for '-c', '-i', '-u', or 'c', 'i', 'u' among clustered non-long options
   (if (string-match "^-[ciu]\\| -[ciu]\\|\\(^\\| \\)-[^- ]+[ciu]"
                     ediff-diff-options)
@@ -1223,7 +1223,7 @@ delimiter regions"))
 ;; like shell-command-sentinel but doesn't print an exit status message
 ;; we do this because diff always exits with status 1, if diffs are found
 ;; so shell-command-sentinel displays a confusing message to the user
-(defun ediff-process-sentinel (process signal)
+(defun ediff-process-sentinel (process _signal)
   (if (and (memq (process-status process) '(exit signal))
            (buffer-name (process-buffer process)))
       (progn
diff --git a/lisp/vc/ediff-init.el b/lisp/vc/ediff-init.el
index 075775923a5..c9f3583a437 100644
--- a/lisp/vc/ediff-init.el
+++ b/lisp/vc/ediff-init.el
@@ -810,7 +810,7 @@ TYPE-OF-EMACS is either 'xemacs or 'emacs."
   (ediff-overlay-put extent 'face face)
   (ediff-overlay-put extent 'help-echo 'ediff-region-help-echo))
 
-(defun ediff-region-help-echo (extent-or-window &optional overlay point)
+(defun ediff-region-help-echo (extent-or-window &optional overlay _point)
   (unless overlay
     (setq overlay extent-or-window))
   (let ((is-current (ediff-overlay-get overlay 'ediff))
@@ -1768,7 +1768,7 @@ Unless optional argument INPLACE is non-nil, return a new string."
   (or n (setq n ediff-current-difference))
   (and (>= n 0) (< n ediff-number-of-differences)))
 
-(defsubst ediff-show-all-diffs (n)
+(defsubst ediff-show-all-diffs (_n)
   "Don't skip difference regions."
   nil)
 
diff --git a/lisp/vc/ediff-merg.el b/lisp/vc/ediff-merg.el
index a1f4d4f5d78..a319d8de9b6 100644
--- a/lisp/vc/ediff-merg.el
+++ b/lisp/vc/ediff-merg.el
@@ -92,6 +92,8 @@ Buffer B."
   )
 (make-variable-buffer-local 'ediff-skip-merge-regions-that-differ-from-default)
 
+(defvar state-of-merge)                 ; dynamic var
+
 ;; check if there is no clash between the ancestor and one of the variants.
 ;; if it is not a merge job then return true
 (defun ediff-merge-region-is-non-clash (n)
@@ -351,8 +353,6 @@ Combining is done according to the specifications in variable
         (reverse delim-regs-list)
         )))
 
-(defvar state-of-merge)                 ; dynamic var
-
 ;; Check if the non-preferred merge has been modified since originally set.
 ;; This affects only the regions that are marked as default-A/B or combined.
 ;; If PREFERS-TOO is non-nil, then look at the regions marked as prefers-A/B as
diff --git a/lisp/vc/ediff-mult.el b/lisp/vc/ediff-mult.el
index 58e10819a30..55e9465d48a 100644
--- a/lisp/vc/ediff-mult.el
+++ b/lisp/vc/ediff-mult.el
@@ -1115,7 +1115,7 @@ behavior."
     (setq overl
           (if (featurep 'xemacs)
               (map-extents
-               (lambda (ext maparg)
+               (lambda (ext _maparg)
                  (if (and
                       (ediff-overlay-get ext 'ediff-meta-info)
                       (eq (ediff-overlay-get ext 'ediff-meta-session-number)
@@ -1444,7 +1444,7 @@ Useful commands:
 
 
 ;; argument is ignored
-(defun ediff-redraw-registry-buffer (&optional ignore)
+(defun ediff-redraw-registry-buffer (&optional _ignore)
   (ediff-with-current-buffer ediff-registry-buffer
     (let ((point (point))
           elt bufAname bufBname bufCname cur-diff total-diffs pt
diff --git a/lisp/vc/ediff-util.el b/lisp/vc/ediff-util.el
index 2f2c71a71e6..fe791f6bcee 100644
--- a/lisp/vc/ediff-util.el
+++ b/lisp/vc/ediff-util.el
@@ -40,7 +40,7 @@
 (defvar ediff-after-quit-hook-internal nil)
 
 (eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  r))))
+  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  _r))))
 
 ;; end pacifier
 
@@ -1602,7 +1602,7 @@ the width of the A/B/C windows."
 ;;BEG, END show the region to be positioned.
 ;;JOB-NAME holds ediff-job-name.  The ediff-windows job positions regions
 ;;differently.
-(defun ediff-position-region (beg end pos job-name)
+(defun ediff-position-region (beg end pos _job-name)
   (if (> end (point-max))
       (setq end (point-max)))
   (if ediff-windows-job
@@ -1685,7 +1685,7 @@ the width of the A/B/C windows."
                             'ediff-get-lines-to-region-start)
                            ((eq op 'scroll-up)
                             'ediff-get-lines-to-region-end)
-                           (t (lambda (a b c) 0))))
+                           (t (lambda (_a _b _c) 0))))
                (max-lines (max (funcall func 'A n ctl-buf)
                                (funcall func 'B n ctl-buf)
                                (if (ediff-buffer-live-p ediff-buffer-C)
diff --git a/lisp/vc/ediff-wind.el b/lisp/vc/ediff-wind.el
index 5a14c193344..785535b82df 100644
--- a/lisp/vc/ediff-wind.el
+++ b/lisp/vc/ediff-wind.el
@@ -40,7 +40,7 @@
 
 ;; declare-function does not exist in XEmacs
 (eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  r))))
+  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  _r))))
 
 (require 'ediff-init)
 (require 'ediff-help)
@@ -280,7 +280,7 @@ into icons, regardless of the window manager."
 
 ;;; Functions
 
-(defun ediff-get-window-by-clicking (wind prev-wind wind-number)
+(defun ediff-get-window-by-clicking (_wind _prev-wind wind-number)
   (let (event)
     (message
      "Select windows by clicking.  Please click on Window %d " wind-number)
@@ -289,9 +289,9 @@ into icons, regardless of the window manager."
           (beep 1))
       (message "Please click on Window %d " wind-number))
     (ediff-read-event) ; discard event
-    (setq wind (if (featurep 'xemacs)
-                   (event-window event)
-                 (posn-window (event-start event))))))
+    (if (featurep 'xemacs)
+        (event-window event)
+      (posn-window (event-start event)))))
 
 
 ;; Select the lowest window on the frame.
diff --git a/lisp/vc/ediff.el b/lisp/vc/ediff.el
index d35c3e53e9a..9ab592587c9 100644
--- a/lisp/vc/ediff.el
+++ b/lisp/vc/ediff.el
@@ -114,7 +114,7 @@
 
 ;; Compiler pacifier
 (eval-and-compile
-  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  r))))
+  (unless (fboundp 'declare-function) (defmacro declare-function (&rest  _r))))
 
 (require 'ediff-util)
 ;; end pacifier
diff --git a/lisp/vc/emerge.el b/lisp/vc/emerge.el
index 8d0e8efc75c..af13665fc2a 100644
--- a/lisp/vc/emerge.el
+++ b/lisp/vc/emerge.el
@@ -849,7 +849,7 @@ This is *not* a user option, since Emerge uses it for its own processing.")
 ;;; Functions to start Emerge on files
 
 ;;;###autoload
-(defun emerge-files (arg file-A file-B file-out &optional startup-hooks
+(defun emerge-files (_arg file-A file-B file-out &optional startup-hooks
                      quit-hooks)
   "Run Emerge on two files."
   (interactive
@@ -869,7 +869,7 @@ This is *not* a user option, since Emerge uses it for its own processing.")
    file-out))
 
 ;;;###autoload
-(defun emerge-files-with-ancestor (arg file-A file-B file-ancestor file-out
+(defun emerge-files-with-ancestor (_arg file-A file-B file-ancestor file-out
                                    &optional startup-hooks quit-hooks)
   "Run Emerge on two files, giving another file as the ancestor."
   (interactive
@@ -1063,7 +1063,7 @@ This is *not* a user option, since Emerge uses it for its own processing.")
        quit-hooks)))
 
 (defun emerge-revisions-internal (file revision-A revision-B &optional
-                                  startup-hooks quit-hooks output-file)
+                                  startup-hooks quit-hooks _output-file)
   (let ((buffer-A (get-buffer-create (format "%s,%s" file revision-A)))
         (buffer-B (get-buffer-create (format "%s,%s" file revision-B)))
         (emerge-file-A (emerge-make-temp-file "A"))
diff --git a/lisp/vc/pcvs.el b/lisp/vc/pcvs.el
index fb91185662a..914eef4dd39 100644
--- a/lisp/vc/pcvs.el
+++ b/lisp/vc/pcvs.el
@@ -648,7 +648,7 @@ If non-nil, NEW means to create a new buffer no matter what."
                              done))))
 
 
-(defun cvs-sentinel (proc msg)
+(defun cvs-sentinel (proc _msg)
   "Sentinel for the cvs update process.
 This is responsible for parsing the output from the cvs update when
 it is finished."
@@ -981,7 +981,7 @@ The files are stored to DIR."
 ;;;;
 
 (defun-cvs-mode (cvs-mode-revert-buffer . SIMPLE)
-                (&optional ignore-auto noconfirm)
+                (&optional _ignore-auto _noconfirm)
   "Rerun `cvs-examine' on the current directory with the default flags."
   (interactive)
   (cvs-examine default-directory t))
@@ -995,7 +995,7 @@ If in a *cvs* buffer, don't prompt unless a prefix argument is given."
     (read-directory-name prompt nil default-directory nil)))
 
 ;;;###autoload
-(defun cvs-quickdir (dir &optional flags noshow)
+(defun cvs-quickdir (dir &optional _flags noshow)
   "Open a *cvs* buffer on DIR without running cvs.
 With a prefix argument, prompt for a directory to use.
 A prefix arg >8 (ex: \\[universal-argument] \\[universal-argument]),