t1100: move creation of expected output into setup test

The "expected" file is created at the top-level of the script, outside
of any test. Code that runs outside of a test is not protected by the
test harness: a failure there is not reported as a test failure and is
easy to miss.

Move the here-doc that creates "expected" into the existing setup test
("test preparation: write empty tree"), using a "<<-" here-doc so its
body can be indented along with the rest of the test.

Signed-off-by: Shlok Kulshreshtha <diy2903@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t1100-commit-tree-options.sh

diff --git a/t/t1100-commit-tree-options.sh b/t/t1100-commit-tree-options.sh
index 9a639f9..3e88890 100755
--- a/t/t1100-commit-tree-options.sh
+++ b/t/t1100-commit-tree-options.sh
@@ -14,15 +14,14 @@
 
 . ./test-lib.sh
 
-cat >expected <<EOF
-tree $EMPTY_TREE
-author Author Name <author@email> 1117148400 +0000
-committer Committer Name <committer@email> 1117150200 +0000
-
-comment text
-EOF
-
 test_expect_success 'test preparation: write empty tree' '
+	cat >expected <<-EOF &&
+	tree $EMPTY_TREE
+	author Author Name <author@email> 1117148400 +0000
+	committer Committer Name <committer@email> 1117150200 +0000
+
+	comment text
+	EOF
 	git write-tree >treeid
 '