Hemingway would complete a manuscript, then go through it and excise every word he considered inessential. The effect was that the main story spooled out not in the pages of his book but in the brain of the reader.
Great literature creates a theater of the mind.
But the most intriguing material in the new documents is what is not in them. The pages are streaked with lines and paragraphs and even pages of paragraphs that have been deleted with a heavy marker. Some were made to protect people's privacy, but many merely delete vulgarities. These efforts are only partially successful. What we learn from the uncensored materials is of dubious value.