[PATCH/RFC v4 03/13] t2104: Don't fail for index versions other than [23]

t2104 currently checks for the exact index version 2 or 3,
depending if there is a skip-worktree flag or not. Other
index versions do not use extended flags and thus cannot
be tested for version changes.

Make this test update the index to version 2 at the beginning
of the test. Testing the skip-worktree flags for the default
index format is still covered by t7011 and t7012.

Signed-off-by: Thomas Gummerer <redacted>
---
 t/t2104-update-index-skip-worktree.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/t/t2104-update-index-skip-worktree.sh b/t/t2104-update-index-skip-worktree.sh
index 1d0879b..bd9644f 100755
--- a/t/t2104-update-index-skip-worktree.sh
+++ b/t/t2104-update-index-skip-worktree.sh

@@ -22,6 +22,7 @@ H sub/2
 EOF
 
 test_expect_success 'setup' '
+	git update-index --index-version=2 &&
 	mkdir sub &&
 	touch ./1 ./2 sub/1 sub/2 &&
 	git add 1 2 sub/1 sub/2 &&

-- 
1.7.11.2