Some of the Continuous Integration tools do a complete documentation rebuild for every PR so that they can report any markup errors or trailing spaces. It would be nice if we could see the docs they built.
This would be especially helpful for PRs that are adding a whole new section to the docs (e.g. the assignment expressions patch or the multiprocessing shared memory patch). Right now, we either have to look at the raw markup or pull down the PR and build the docs ourselves. As a reviewer, I like to see the docs in their final form to assess their intelligibility.