Description:
------------
ob_get_contents() ignores the first new line after ending php tag ?>.

Reproduce code:
---------------
<?php ob_start(); ?>
a
<?php

$content = ob_get_contents();
ob_end_clean();

for ($i = 0; $i < strlen($content); $i++) {
    echo ord($content[$i])."\n";
}

?>

Expected result:
----------------
10
97
10

Actual result:
--------------
97
10