t7004: description on the same line as test_expect_success

There are several tests in t7004 where the test description that
follows `test_expect_success` is on a separate line, violating our
coding style. Adapt these to be on the same line.

Signed-off-by: AbdAlRahman Gad <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: AbdAlRahmanGad