t7001: use here-docs instead of echo

Change from old style to current style by taking advantage of
here-docs instead of echo commands.

Signed-off-by: Shubham Verma <shubhunic@gmail.com>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t7001-mv.sh

@@ -228,7 +228,10 @@ test_expect_success 'git mv to move multiple sources into a directory' '
 	git add dir/?.txt &&
 	git mv dir/a.txt dir/b.txt other &&
 	git ls-files >actual &&
-	{ echo other/a.txt; echo other/b.txt; } >expect &&
+	cat >expect <<-\EOF &&
+	other/a.txt
+	other/b.txt
+	EOF
 	test_cmp expect actual
 '