Pre-Release Testing for v8.5

[John Clements]

Testing for the v8.5 release
(using the v8.4.900 release candidate build)

Search for your name on the checklist page to find relevant items,
either
reply when you finish an item (please indicate which item/s is/are
done),
or check it off yourself on the checklist page. Also, if you have any
commits that should have been picked, make sure that the changes are in.

Be sure to finish your testing by the 25th. Otherwise the release
will move on without your input.

The checklist page is at:
https://github.com/racket/racket/wiki/Release-Checklist-8.5

Release candidates are at:
https://pre-release.racket-lang.org

Please use these installers (or source bundles) -- don't test from
your own git clone (don't test the `master' branch by mistake!).
To get the tests, you can do this:

cd ...racket-root...
./bin/raco pkg install -i --auto main-distribution-test

Thanks!

John