[Outreachy][PATCH v4] t2400: avoid losing exit status to pipes

[Achu Luma <ach.lumap@gmail.com>]

The exit code of the preceding command in a pipe is disregarded. So
if that preceding command is a Git command that fails, the test would
not fail. Instead, by saving the output of that Git command to a file,
and removing the pipe, we make sure the test will fail if that Git
command fails.

Signed-off-by: Achu Luma <ach.lumap@gmail.com>
---
 The difference between v3 and v4 is:
 - Changed subject to better reflect what the patch is doing.
 - Updated the commit message.

 t/t2400-worktree-add.sh | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/t/t2400-worktree-add.sh b/t/t2400-worktree-add.sh
index 3742971105..b597004adb 100755
--- a/t/t2400-worktree-add.sh
+++ b/t/t2400-worktree-add.sh
@@ -490,7 +490,8 @@ test_expect_success 'put a worktree under rebase' '
 		cd under-rebase &&
 		set_fake_editor &&
 		FAKE_LINES="edit 1" git rebase -i HEAD^ &&
-		git worktree list | grep "under-rebase.*detached HEAD"
+		git worktree list >actual &&
+		grep "under-rebase.*detached HEAD" actual
 	)
 '

@@ -531,7 +532,8 @@ test_expect_success 'checkout a branch under bisect' '
 		git bisect start &&
 		git bisect bad &&
 		git bisect good HEAD~2 &&
-		git worktree list | grep "under-bisect.*detached HEAD" &&
+		git worktree list >actual &&
+		grep "under-bisect.*detached HEAD" actual &&
 		test_must_fail git worktree add new-bisect under-bisect &&
 		! test -d new-bisect
 	)
--
2.43.0.windows.1