t9603: use tabs for indentation

This patch will let the new `check-whitespace` GitHub workflow be happy
with the upcoming patch series that wants to search-and-replace `master`
with `main` in t9603 and some other test scripts.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9603-cvsimport-patchsets.sh

@@ -17,23 +17,23 @@ test_description='git cvsimport testing for correct patchset estimation'
 setup_cvs_test_repository t9603
 
 test_expect_failure PERL 'import with criss cross times on revisions' '
-
-    git cvsimport -p"-x" -C module-git module &&
-    (cd module-git &&
-        git log --pretty=format:%s > ../actual-master &&
-        git log A~2..A --pretty="format:%s %ad" -- > ../actual-A &&
-        echo "" >> ../actual-master &&
-	echo "" >> ../actual-A
-    ) &&
-    echo "Rev 4
+	git cvsimport -p"-x" -C module-git module &&
+	(
+		cd module-git &&
+		git log --pretty=format:%s > ../actual-master &&
+		git log A~2..A --pretty="format:%s %ad" -- > ../actual-A &&
+		echo "" >> ../actual-master &&
+		echo "" >> ../actual-A
+	) &&
+	echo "Rev 4
 Rev 3
 Rev 2
 Rev 1" > expect-master &&
-    test_cmp expect-master actual-master &&
+	test_cmp expect-master actual-master &&
 
-    echo "Rev 5 Branch A Wed Mar 11 19:09:10 2009 +0000
+	echo "Rev 5 Branch A Wed Mar 11 19:09:10 2009 +0000
 Rev 4 Branch A Wed Mar 11 19:03:52 2009 +0000" > expect-A &&
-    test_cmp expect-A actual-A
+	test_cmp expect-A actual-A
 '
 
 test_done