bug#10754: define-minor-mode and doc of derived mode

[Eli Zaretskii]

> From: John Shahid <jvshahid@gmail.com>
> Date: Fri, 08 Jun 2018 21:45:03 +0000
> Cc: 10754@debbugs.gnu.org
> 
> attached a poc patch. wdyt ?
> 
> >From 1a1efd1417356d26dd818622497512c28005f03c Mon Sep 17 00:00:00 2001
> From: John Shahid <jvshahid@gmail.com>
> Date: Tue, 5 Jun 2018 19:56:12 -0400
> Subject: [PATCH] allow interpolation of %{arg} in define-minor-mode DOC
> 
> * easy-mmode.el (define-minor-mode): interpolate %{arg} in DOC with
>   documentation of the mode argument
> * linum.el (linum-mode): use %{arg} in the docstring

Stefan, WDYT about this?