Handle "-" at beginning of filenames, part 3

This fixes the default built-in exec() of "diff" to add a "--" before the 
filenames, so that if a filename starts with a "-", the diff program won't 
think it's an option.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

This should complete the series. Now all the parts should be safe and pass 
on "--" properly. Knock wood.


On Mon, 17 Oct 2005, Linus Torvalds wrote:

It adds "--" to the git-diff.sh scripts, to keep any filenames that start 
with a "-" from being confused with an option.

diff --git a/diff.c b/diff.c
index cbb8632..d6b5086 100644
--- a/diff.c
+++ b/diff.c

@@ -134,7 +134,7 @@ static void builtin_diff(const char *nam
 {
 	int i, next_at, cmd_size;
 	const char *const diff_cmd = "diff -L%s%s -L%s%s";
-	const char *const diff_arg  = "%s %s||:"; /* "||:" is to return 0 */
+	const char *const diff_arg  = "-- %s %s||:"; /* "||:" is to return 0 */
 	const char *input_name_sq[2];
 	const char *path0[2];
 	const char *path1[2];