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

[Stephen J. Turnbull]

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.