FWIW I actually liked the indent change that was put in the first place. If you look at the explanation in that commit, it makes sense why that indent change was done. 

I did not understand why it was reverted in this recent commit. 

Kaushal 

On Saturday, February 27, 2016, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
>     * lisp/emacs-lisp/derived.el (define-derived-mode): Revert indent change.

One more time: please always include some kind of explanation when you
revert code.  E.g. a bug# or something.


        Stefan



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Kaushal Modi