J.K. Rowling drops Twitter hints about a big 'Fantastic Beasts 2' plot point

As well as shutting down trolls and slamming Donald Trump, one of J.K. Rowling's other favourite Twitter past-times is micro-blogging her writing process.
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She's previously shared advice for aspiring writers, and on one memorable occasion she even posted photos of the rejection letters she'd received in the past. 
On Thursday, Rowling was clearly in a sharing mood.Today I've rewritten until my brain fee