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Re: Should mode commands be idempotent?

From: Clément Pit-Claudel
Subject: Re: Should mode commands be idempotent?
Date: Sat, 23 Sep 2017 10:05:00 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 2017-09-22 17:54, Drew Adams wrote:
> Has someone actually reported a problem that s?he ran into by
> encountering an actual mode function that was not idempotent?

I think I mentioned visual-line-mode; the fact that it's not idempotent is a 
concrete (though minor) problem for me.
I enable it in a hook, and a major mode that I use enables it too.  Due to the 
way visual-line-mode works, disabling it after this doesn't restore my original 


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