t1092: fix buggy sparse "blame" test

This test wants to verify that `git blame` errors out when asked to
blame a file _not_ in the sparse checkout. However, the very first file
it asks to blame _is_ present in the checkout, thus `test_must_fail git
blame $file` gives an unexpected result (the "blame" succeeds). This
problem went unnoticed because the test invokes `test_must_fail git
blame $file` in loop but forgets to break out of the loop early upon
failure, thus the failure gets swallowed.

Fix the test by having it not ask to blame a file present in the sparse
checkout, and instead only blame files not present, as intended. While
at it, also add the missing `|| return 1` which allowed this bug to go
unnoticed.

Signed-off-by: Eric Sunshine <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: sunshineco

t/t1092-sparse-checkout-compatibility.sh

@@ -567,7 +567,7 @@ test_expect_success 'blame with pathspec outside sparse definition' '
 	init_repos &&
 	test_sparse_match git sparse-checkout set &&
 
-	for file in a \
+	for file in \
 			deep/a \
 			deep/deeper1/a \
 			deep/deeper1/deepest/a
@@ -579,7 +579,7 @@ test_expect_success 'blame with pathspec outside sparse definition' '
 		# We compare sparse-checkout-err and sparse-index-err in
 		# `test_sparse_match`. Given we know they are the same, we
 		# only check the content of sparse-index-err here.
-		test_cmp expect sparse-index-err
+		test_cmp expect sparse-index-err || return 1
 	done
 '