t2402: test worktree path when called in .git directory

The bug which reports an extra `/.git/.` in worktree path when called in
'.git' directory already has been fixed. But unfortunately, the regression
test to ensure this behavior has been forgotten.
Here is that test.

Helped-by: Johannes Schindelin <[email protected]>
Signed-off-by: Hariom Verma <[email protected]>
Acked-by: Eric Sunshine <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: harry-hov

t/t2402-worktree-list.sh

@@ -151,4 +151,10 @@ test_expect_success 'linked worktrees are sorted' '
 	test_cmp expected sorted/main/actual
 '
 
+test_expect_success 'worktree path when called in .git directory' '
+	git worktree list >list1&&
+	git -C .git worktree list >list2 &&
+	test_cmp list1 list2
+'
+
 test_done