Re: How to find when a function/var has been added

[Przemysław Wojnowski]

> I think maybe Przemysław is asking for something more, including
> changes to the default value or possible values of an option, and
> changes to the behavior or at least the calling sequence of an
> existing function.
>
> Dunno how much would be feasible or what forms it might take, but
> I agree that there is a use case for it.
I was thinking about adding "Since: ${emacs-version}" to docs of functions and 
variables just to make it easier to write backward compatible packages.

If I would like to preserve compatibility with Emacs 24.3.1 I wouldn't use newer 
functions/values. Now it is not that easy (at least for me) to find out since 
when a function/variable/package is in Emacs, which makes programming a bit slower.