CVS update by michaelk packages/xemacs-packages/ediff, ediff-vers.el, ediff-ptch.el, ediff-init.el, ediff-diff.el ...

[Michael Kifer]

So, perhaps 21.4 should use an older ediff package?
This update was mostly a cleanup, and it is appropriate to use the newer
API.

> Michael Kifer writes:
> 
>  > This was an update from the emacs tree and I did not check that XEmacs'
>  > version of require does not take the third argument.  Rather than changing
>  > it in ediff, would not it be a good idea to sync requite with emacs?  It
>  > has an optional third argument, noerror. I think it would be a good thing.
> 
> The three-argument require is already in 21.5.  We continue to support
> 21.4, but it is supposed to be stable; API changes in general should
> not be made.
> 
> A recent survey at a large Emacs-using shop showed that about 10% of
> users of Emacsen are using unsupported versions as of October 2007,
> this probably jumped to 30% with the release of Emacs 22.1 (this shop
> is a heavy user of XEmacs, in others it would probably be much
> higher).  About 40% were not using the latest release of the version
> they use.