At first glance, it looks like the following patch would restore the
previous behavior, however it completely breaks auto refinement.
diff --git a/lisp/vc/diff-mode.el b/lisp/vc/diff-mode.el
index 9dfcd944bb..3442b01d12 100644
--- a/lisp/vc/diff-mode.el
+++ b/lisp/vc/diff-mode.el
@@ -625,7 +625,7 @@ diff--wrap-navigation
;; inner one does not, which breaks the loop.
(defun diff-hunk-prev (&optional count skip-hunk-start)
"Go to the previous COUNT'th hunk."
- (interactive (list (prefix-numeric-value current-prefix-arg) t))
+ (interactive (list (prefix-numeric-value current-prefix-arg) nil))
(diff--wrap-navigation
skip-hunk-start
"prev hunk"
@@ -636,7 +636,7 @@ diff-hunk-prev
(defun diff-hunk-next (&optional count skip-hunk-start)
"Go to the next COUNT'th hunk."
- (interactive (list (prefix-numeric-value current-prefix-arg) t))
+ (interactive (list (prefix-numeric-value current-prefix-arg) nil))
(diff--wrap-navigation
skip-hunk-start
"next hunk"
@@ -647,7 +647,7 @@ diff-hunk-next
(defun diff-file-prev (&optional count skip-hunk-start)
"Go to the previous COUNT'th file."
- (interactive (list (prefix-numeric-value current-prefix-arg) t))
+ (interactive (list (prefix-numeric-value current-prefix-arg) nil))
(diff--wrap-navigation
skip-hunk-start
"prev file"
@@ -658,7 +658,7 @@ diff-file-prev
(defun diff-file-next (&optional count skip-hunk-start)
"Go to the next COUNT'th file."
- (interactive (list (prefix-numeric-value current-prefix-arg) t))
+ (interactive (list (prefix-numeric-value current-prefix-arg) nil))
(diff--wrap-navigation
skip-hunk-start
"next file"