t3701: use test_write_lines and write_script

Simplify things slightly by using the above helpers.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3701-add-interactive.sh

@@ -87,13 +87,8 @@ test_expect_success 'setup expected' '
 	EOF
 '
 
-test_expect_success 'setup fake editor' '
-	>fake_editor.sh &&
-	chmod a+x fake_editor.sh &&
-	test_set_editor "$(pwd)/fake_editor.sh"
-'
-
 test_expect_success 'dummy edit works' '
+	test_set_editor : &&
 	(echo e; echo a) | git add -p &&
 	git diff > diff &&
 	test_cmp expected diff
@@ -110,12 +105,10 @@ test_expect_success 'setup patch' '
 '
 
 test_expect_success 'setup fake editor' '
-	echo "#!$SHELL_PATH" >fake_editor.sh &&
-	cat >>fake_editor.sh <<-\EOF &&
+	write_script "fake_editor.sh" <<-\EOF &&
 	mv -f "$1" oldpatch &&
 	mv -f patch "$1"
 	EOF
-	chmod a+x fake_editor.sh &&
 	test_set_editor "$(pwd)/fake_editor.sh"
 '
 
@@ -302,18 +295,12 @@ test_expect_success 'deleting an empty file' '
 
 test_expect_success 'split hunk setup' '
 	git reset --hard &&
-	for i in 10 20 30 40 50 60
-	do
-		echo $i
-	done >test &&
+	test_write_lines 10 20 30 40 50 60 >test &&
 	git add test &&
 	test_tick &&
 	git commit -m test &&
 
-	for i in 10 15 20 21 22 23 24 30 40 50 60
-	do
-		echo $i
-	done >test
+	test_write_lines 10 15 20 21 22 23 24 30 40 50 60 >test
 '
 
 test_expect_success 'split hunk "add -p (edit)"' '
@@ -334,17 +321,7 @@ test_expect_success 'split hunk "add -p (edit)"' '
 '
 
 test_expect_failure 'split hunk "add -p (no, yes, edit)"' '
-	cat >test <<-\EOF &&
-	5
-	10
-	20
-	21
-	30
-	31
-	40
-	50
-	60
-	EOF
+	test_write_lines 5 10 20 21 30 31 40 50 60 >test &&
 	git reset &&
 	# test sequence is s(plit), n(o), y(es), e(dit)
 	# q n q q is there to make sure we exit at the end.