((and (null (match-string 4)) (match-string 5))
(concat "New " kind filemode newfile))
((null (match-string 2))
- (concat "Deleted" kind filemode oldfile))
+ ;; We used to use
+ ;; (concat "Deleted" kind filemode oldfile)
+ ;; here but that misfires for `diff-buffers'
+ ;; (see 24 Jun 2022 message in bug#54034).
+ ;; AFAIK if (match-string 2) is nil then so is
+ ;; (match-string 1), so "Deleted" doesn't sound right,
+ ;; so better just let the header in plain sight for now.
+ ;; FIXME: `diff-buffers' should maybe try to better
+ ;; mimic Git's format with "a/" and "b/" so prettification
+ ;; can "just work!"
+ nil)
(t
(concat "Modified" kind filemode oldfile)))
'face '(diff-file-header diff-header))