Unicode labels U+000A as all of "LINE FEED (LF)", "new line (NL)" and "end of line (EOL)". I'm guessing different names were imported from slightly different character sets, although I understand the all-uppercase name to be the main/official one.

https://www.unicode.org/charts/PDF/U0000.pdf

NL, or New Line, is a character in some character sets, like old mainframe computers. No need to be snarky just because he mistyped or uses a different name for something.

I am more surprised by the description of “rock döts”. A Norwegian certainly knows that ASCII is not enough for all our alphabetical needs.