t7408: modernize style

No functional change intended. This commit only changes formatting
to the style we recently use, e.g. starting the body of a test with a
single quote on the same line as the header, and then having the test
indented in the following lines.

Whenever we change directories, we do that in subshells.

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

t/t7408-submodule-reference.sh

@@ -8,74 +8,76 @@ test_description='test clone --reference'
 
 base_dir=$(pwd)
 
-U=$base_dir/UPLOAD_LOG
-
-test_expect_success 'preparing first repository' \
-'test_create_repo A && cd A &&
-echo first > file1 &&
-git add file1 &&
-git commit -m A-initial'
-
-cd "$base_dir"
-
-test_expect_success 'preparing second repository' \
-'git clone A B && cd B &&
-echo second > file2 &&
-git add file2 &&
-git commit -m B-addition &&
-git repack -a -d &&
-git prune'
-
-cd "$base_dir"
-
-test_expect_success 'preparing superproject' \
-'test_create_repo super && cd super &&
-echo file > file &&
-git add file &&
-git commit -m B-super-initial'
-
-cd "$base_dir"
-
-test_expect_success 'submodule add --reference' \
-'cd super && git submodule add --reference ../B "file://$base_dir/A" sub &&
-git commit -m B-super-added'
-
-cd "$base_dir"
-
-test_expect_success 'after add: existence of info/alternates' \
-'test_line_count = 1 super/.git/modules/sub/objects/info/alternates'
-
-cd "$base_dir"
-
-test_expect_success 'that reference gets used with add' \
-'cd super/sub &&
-echo "0 objects, 0 kilobytes" > expected &&
-git count-objects > current &&
-diff expected current'
-
-cd "$base_dir"
-
-test_expect_success 'cloning superproject' \
-'git clone super super-clone'
-
-cd "$base_dir"
-
-test_expect_success 'update with reference' \
-'cd super-clone && git submodule update --init --reference ../B'
-
-cd "$base_dir"
-
-test_expect_success 'after update: existence of info/alternates' \
-'test_line_count = 1 super-clone/.git/modules/sub/objects/info/alternates'
-
-cd "$base_dir"
-
-test_expect_success 'that reference gets used with update' \
-'cd super-clone/sub &&
-echo "0 objects, 0 kilobytes" > expected &&
-git count-objects > current &&
-diff expected current'
-
-cd "$base_dir"
+test_expect_success 'preparing first repository' '
+	test_create_repo A &&
+	(
+		cd A &&
+		echo first >file1 &&
+		git add file1 &&
+		git commit -m A-initial
+	)
+'
+
+test_expect_success 'preparing second repository' '
+	git clone A B &&
+	(
+		cd B &&
+		echo second >file2 &&
+		git add file2 &&
+		git commit -m B-addition &&
+		git repack -a -d &&
+		git prune
+	)
+'
+
+test_expect_success 'preparing superproject' '
+	test_create_repo super &&
+	(
+		cd super &&
+		echo file >file &&
+		git add file &&
+		git commit -m B-super-initial
+	)
+'
+
+test_expect_success 'submodule add --reference' '
+	(
+		cd super &&
+		git submodule add --reference ../B "file://$base_dir/A" sub &&
+		git commit -m B-super-added
+	)
+'
+
+test_expect_success 'after add: existence of info/alternates' '
+	test_line_count = 1 super/.git/modules/sub/objects/info/alternates
+'
+
+test_expect_success 'that reference gets used with add' '
+	(
+		cd super/sub &&
+		echo "0 objects, 0 kilobytes" >expected &&
+		git count-objects >current &&
+		diff expected current
+	)
+'
+
+test_expect_success 'cloning superproject' '
+	git clone super super-clone
+'
+
+test_expect_success 'update with reference' '
+	cd super-clone && git submodule update --init --reference ../B
+'
+
+test_expect_success 'after update: existence of info/alternates' '
+	test_line_count = 1 super-clone/.git/modules/sub/objects/info/alternates
+'
+
+test_expect_success 'that reference gets used with update' '
+	cd super-clone/sub &&
+	echo "0 objects, 0 kilobytes" >expected &&
+	git count-objects >current &&
+	diff expected current
+'
 
 test_done