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Interviewer: How much rewriting do you do?
Hemingway: It depends. I rewrote the ending of Farewell to Arms, the last page of it, 39 times before I was satisfied.
Interviewer: Was there some technical problem there? What was it that had stumped you?
Hemingway: Getting the words right.
– Ernest Hemingway, The Paris Review Interview, 1956
“I have rewritten — often several times — every word I have ever published. My pencils outlast their erasers.” — Vladimir Nabokov, Speak, Memory, 1966
This will require some form of tracking between diffs.