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From:
Daniel Lemire's blog
(Uncensored)
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Splitting a long string in lines efficiently
https://lemire.me/blog/2025/09/07/splitting-a-long-string-in-lines-efficiently/
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Suppose that you have a long string and you want to insert line breaks every 72 characters. You might need to do this if you need to write a public cryptographic key to a text file.
