Line 20 should be something like:
SearchEngineDomain => array( SearchEnginesName, KeywordParameter(s) PathContainingTheKeyword CharsetUsedBySearchEngine )
A link to the faq would be nice, too:
http://piwik.org/faq/general/#faq_39
Keywords: search engines
Attachment: Cleaned nad single quoted search engine array
SearchEngines.php
(In [1258]) fixes #826 - update comments in SearchEngines.php