bug#37414: 26.3; (emacs) `Contributing': no `etc/CONTRIBUTE'

[Drew Adams]

> > emacs -Q for Emacs 26.3 says this in `(emacs) Contributing':
> >
> >   If you would like to make more extensive contributions, see the
> >   'CONTRIBUTE' file in the Emacs distribution for information on
> >   how to be an Emacs developer.
> >
> > > > Where is a user on MS Windows supposed to find file `CONTRIBUTE'?
> > >
> > > In the source tree, as the contents of that file has changed and makes
> > > no sense without access to the sources.
> >
> > No idea what "the source tree" means here.  That node tells
> > users to look for file CONTRIBUTE "in the Emacs distribution".
> > Where is it in the Emacs distribution?
> 
> In the source tarball, in the top-level directory.

What's that?  I have an "Emacs distribution" for 26.3, from here
(the location announced in emacs-devel@gnu.org on 2019-09-01): 

https://urldefense.proofpoint.com/v2/url?u=https-3A__alpha.gnu.org_gnu_emacs_pretest_windows_emacs-2D26_&d=DwICAg&c=RoP1YumCXCgaWHvlZYR8PZh8Bv7qIrMUB65eapI_JnE&r=kI3P6ljGv6CTHIKju0jqInF6AOwMCYRDQUmqX22rJ98&m=7le47_VmxC77S4y7ZAEyhihP7eM9uhQzgEyuCq2jGAE&s=lZL3oWwAmq2LTzXevRIMYcwDl_2GbE3phyns_9v30RI&e=

There is no CONTRIBUTE anywhere in that zip archive, AFAICT.