t3404: cleanup double empty lines between tests

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3404-rebase-interactive.sh

@@ -771,7 +771,6 @@ test_expect_success 'rebase-i history with funny messages' '
 	test_cmp expect actual
 '
 
-
 test_expect_success 'prepare for rebase -i --exec' '
 	git checkout master &&
 	git checkout -b execute &&
@@ -780,7 +779,6 @@ test_expect_success 'prepare for rebase -i --exec' '
 	test_commit three_exec main.txt three_exec
 '
 
-
 test_expect_success 'running "git rebase -i --exec git show HEAD"' '
 	set_fake_editor &&
 	git rebase -i --exec "git show HEAD" HEAD~2 >actual &&
@@ -793,7 +791,6 @@ test_expect_success 'running "git rebase -i --exec git show HEAD"' '
 	test_cmp expected actual
 '
 
-
 test_expect_success 'running "git rebase --exec git show HEAD -i"' '
 	git reset --hard execute &&
 	set_fake_editor &&
@@ -807,7 +804,6 @@ test_expect_success 'running "git rebase --exec git show HEAD -i"' '
 	test_cmp expected actual
 '
 
-
 test_expect_success 'running "git rebase -ix git show HEAD"' '
 	git reset --hard execute &&
 	set_fake_editor &&
@@ -835,7 +831,6 @@ test_expect_success 'rebase -ix with several <CMD>' '
 	test_cmp expected actual
 '
 
-
 test_expect_success 'rebase -ix with several instances of --exec' '
 	git reset --hard execute &&
 	set_fake_editor &&
@@ -850,7 +845,6 @@ test_expect_success 'rebase -ix with several instances of --exec' '
 	test_cmp expected actual
 '
 
-
 test_expect_success 'rebase -ix with --autosquash' '
 	git reset --hard execute &&
 	git checkout -b autosquash &&