Upgrading from 5.4.2.1 to 5.4.2.2

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I am trying to upgrade from Concrete5 version 5.4.2.1 to 5.4.2.2. I have downloaded the zip file, unzipped the web files, and replaced the "concrete" folder on the website with the one from the zip file but when I access the upgrade.php page I get the following error:

Parse error: syntax error, unexpected $end, expecting ')' in /home/allenwoo/public_html/updates/concrete5.4.2.2/concrete/models/collection.php on line 491

Anyone got any ideas?

Thanks