t/t3437: fixup here-docs in the 'setup' test

The most common way to format here-docs in Git test scripts is for the
body and EOF to be indented the same amount as the command which opened
the here-doc. Fix a few here-docs in this script to conform to that
standard and also remove the unnecessary curly braces.

Mentored-by: Christian Couder <chriscool@tuxfamily.org>
Mentored-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Charvi Mendiratta <charvi077@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3437-rebase-fixup-options.sh

@@ -38,13 +38,13 @@ get_author () {
 
 test_expect_success 'setup' '
 	cat >message <<-EOF &&
-		amend! B
+	amend! B
-		${EMPTY}
+	$EMPTY
-		new subject
+	new subject
-		${EMPTY}
+	$EMPTY
-		new
+	new
-		body
+	body
-		EOF
+	EOF
 
 	sed "1,2d" message >expected-message &&
 
@@ -70,38 +70,38 @@ test_expect_success 'setup' '
 	git commit --fixup=HEAD -a &&
 	test_tick &&
 	git commit --allow-empty -F - <<-EOF &&
-		amend! B
+	amend! B
-		${EMPTY}
+	$EMPTY
-		B
+	B
-		${EMPTY}
+	$EMPTY
-		edited 1
+	edited 1
-		EOF
+	EOF
 	test_tick &&
 	git commit --allow-empty -F - <<-EOF &&
-		amend! amend! B
+	amend! amend! B
-		${EMPTY}
+	$EMPTY
-		B
+	B
-		${EMPTY}
+	$EMPTY
-		edited 1
+	edited 1
-		${EMPTY}
+	$EMPTY
-		edited 2
+	edited 2
-		EOF
+	EOF
 	echo B2 >B &&
 	test_tick &&
 	FAKE_COMMIT_AMEND="edited squash" git commit --squash=HEAD -a &&
 	echo B3 >B &&
 	test_tick &&
 	git commit -a -F - <<-EOF &&
-		amend! amend! amend! B
+	amend! amend! amend! B
-		${EMPTY}
+	$EMPTY
-		B
+	B
-		${EMPTY}
+	$EMPTY
-		edited 1
+	edited 1
-		${EMPTY}
+	$EMPTY
-		edited 2
+	edited 2
-		${EMPTY}
+	$EMPTY
-		edited 3
+	edited 3
-		EOF
+	EOF
 
 	GIT_AUTHOR_NAME="Rebase Author" &&
 	GIT_AUTHOR_EMAIL="rebase.author@example.com" &&