Re: Should mode commands be idempotent?

[Richard Stallman]

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Users expect major modes to be idempotent.  Any time one is not, it
will cause them surprises.  We should treat that as a bug and fix it
to be idempotent.

As for minor modes, it has been pointed out (by Stefan?) that multiple
hooks could enable the same major mode, and the result should be the
same as if just one hook did so.

-- 
Dr Richard Stallman
President, Free Software Foundation (gnu.org, fsf.org)
Internet Hall-of-Famer (internethalloffame.org)
Skype: No way! See stallman.org/skype.html.