Careful, when the delimiters are doubled, the file format might allow a single ] or [ on the inside, in which case the negated char class doesn't work.

In that case you can use 

(?s:(?!\]\]).)*

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Perl 6 - second systems done right

In reply to Re^3: Can't quite get this regex working by moritz
in thread Can't quite get this regex working by ultranerds

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