Just like many other parsers, PRD allows for optional whitespace between 'tokens'. So, after PRD has matched a token, it will first eat all whitespace before attempting to match another token. Therefore, if you don't change the whitespace eating behaviour, PRD will never match a token that starts with whitespace. And DD_Style is a token that starts with whitespace, the regex starts with \s+?.

You can do one of two things. You can either make use of the <skip> directive (or some by some other means) to alter the 'eating of whitespace between tokens' behaviour, or you remove the leading \s+? from the DD_Style token. I'd prefer to do the latter, after all, the comment starts with the --, and not with the whitespace.

Abigail