bug#52810: 29.0.50; diff-font-lock-prettify broken on new and deleted files

[Lars Ingebrigtsen <larsi@gnus.org>]

Matthias Meulien <orontee@gmail.com> writes:

> Proposed fixed

Thanks; applied to Emacs 28.

> (but I must confess I've no idea why the original code
> tried to set two distinct overlays):

There's no overlays here -- do you mean display text properties?

Anyway, the code was originally the below, but that was changed in
f0768d31457.

-                                      ((null (match-beginning 1)) "new file  ")
-                                      ((null (match-beginning 2)) "deleted   ")
-                                      (t                          "modified  "))
+                                      ((null (match-beginning 1))
+                                       (concat "new file  " (match-string 2)))
+                                      ((null (match-beginning 2))
+                                       (concat "deleted   " (match-string 1)))
+                                      (t
+                                       (concat "modified  " (match-string 1))))
                                      'face '(diff-file-header diff-header)))
-        (unless (match-beginning 2)
-          (put-text-property (match-end 1) (1- (match-end 0))
-                             'display "")))))
+        (put-text-property (match-end 1) (1- (match-end 0))
+                           'display ""))))


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