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Strip empty paragraphs from works on Archive of Our Own
Archive of Our Own is a fanfiction archive. Some works on the site are displayed with huge spaces between paragraphs, which makes them annoying to read: this is because there are additional paragraphs in between which contain only whitespace.
I assume that this happens because some writers upload their works with double newlines between paragraphs, and AO3's import preserves them instead of stripping them out. This script removes all paragraphs containing only whitespace from all works on the site.