In vim search and replace, newline is rendering as "^@"

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How to replace a character by a newline in Vim? 11 answers

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In :s 's replacement field, you need to use r not n for newline characters.

^@ is the ASCII null character. Vim internally uses r for newlines (which is ^M), and n for ASCII null, so in the replacement, if you use n you're getting those null characters instead of newlines. See also :h sub-replace-special

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