;; 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)
;; 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