Re: news and docs for command-error-function

[Jarek Czekalski]

W dniu 2013-12-30 14:09, Stefan Monnier pisze:

> > 3. the way it could be substituted before 24.4 (a lisp snippet, like in
> > http://lists.gnu.org/archive/html/emacs-devel/2013-10/msg00819.html)
> This is a problem solved in 24.4 rather than introduced in 24.4, so 24.4
> is not the place to document how it could have been solved earlier.

Let's assume that I am a package writer and will to use 
command-error-function. I have Emacs 24.4, but I want my code to be 
backward compatible with all Emacs versions having command-error-funcion 
at all. Of course I am starting with reading the docs of 
command-error-function. This is usually not enough (for example to 
figure out since what version the variable exists), so I also grep 
NEWS*. Will I be able to do my work after reading these places?

Jarek