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If you get a machine with one of the new m4 apple processors do NOT type “dnl” or you will break the cpu.

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in reply to RevK :verified_r:

@RevK :verified_r: @Christopher Biggs It's a bad joke. In the preprocessor language M4, DNL is "discard until newline", i.e. a comment.
in reply to RevK :verified_r:

@revk there is a venerable and primitive programming language called m4 which is (many would say alas) still in use. One of its weird quirks is that it uses “dnl” as its comment syntax “delete through new line”.