Re: [Emacs-diffs] emacs-25 b6d6304: Comment on last change to define-derived-mode

[Kaushal Modi]

That style of writing everything in a single line will usually cause that line to exceed the default fill-column of 70. I believe most of the code in emacs source tries to keep the line lengths around that number.

Also I am one of those people who prefer keeping line lengths around 70-80 characters. The 3-space indentation style helps achieve that goal. IMO breaking up forms like define-derived-mode, define-minor-mode, etc makes the code easier to read if each key-value component is written on a different line.

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Kaushal Modi