File packages-cvs-xemacs-sumo-2005-12-08-diff-mode.patch of Package xemacs-packages

diff -ru packages.orig/xemacs-packages/prog-modes/diff-mode.el packages/xemacs-packages/prog-modes/diff-mode.el
--- packages/xemacs-packages/prog-modes/diff-mode.el	2005-12-02 10:54:34.000000000 +0100
+++ packages/xemacs-packages/prog-modes/diff-mode.el	2005-12-13 17:18:21.000000000 +0100
@@ -914,6 +914,26 @@
 			  (equal ?\  c)))
 		(forward-line 1))))))))))
 
+(defvar diff-fixup-modif-regexp
+  (concat
+   ;; start
+   "\\("
+   ;; unified hunk start
+   "@@ -[0-9,]+ \\+[0-9,]+ @@.*"
+   ;; or
+   "\\|"
+   ;; unified hunk+file start
+   ;;   --- .*
+   ;;   +++ .*
+   ;;   @@ ...
+   "--- .+\n\\+\\+\\+ .+\n@@ -[0-9,]+ \\+[0-9,]+ @@"
+   ;; or
+   "\\|"
+   ;; context start
+   "[-*][-*][-*] .+ [-*][-*][-*][-*]"
+   ;; end
+   "\\)$"))
+
 (defun diff-fixup-modifs (start end)
   "Fixup the hunk headers (in case the buffer was modified).
 START and END are either taken from the region (if a prefix arg is given) or
@@ -926,10 +946,7 @@
       (goto-char end) (diff-end-of-hunk)
       (let ((plus 0) (minus 0) (space 0) (bang 0))
 	(while (and (= (forward-line -1) 0) (<= start (point)))
-	  (if (not (looking-at
-		    (concat "@@ -[0-9,]+ \\+[0-9,]+ @@"
-			    "\\|[-*][-*][-*] [0-9,]+ [-*][-*][-*][-*]$"
-			    "\\|--- .+\n\\+\\+\\+ ")))
+	  (if (not (looking-at diff-fixup-modif-regexp))
 	      (case (char-after)
 		(?\  (incf space))
 		(?+ (incf plus))