table formatting does not have grid lines with Sphinx>=2.0

[Matt Riedemann]

https://docs.openstack.org/nova/latest/admin/configuration/schedulers.html#id16

The grid lines are gone and I'm not sure what regression caused that but tables are less than ideal now (they don't look like html tables anymore).

[Matt Riedemann (mriedem)]

I noticed this while reviewing this list-table docs change:

https://review.openstack.org/#/c/653719/1/doc/source/contributor/contributing.rst

[Matt Riedemann (mriedem)]

Related: https://review.openstack.org/#/c/652171/

[Andreas Jaeger (jaegerandi)]

compare with https://docs.openstack.org/nova/stein/admin/configuration/schedulers.html#id16

[Matt Riedemann (mriedem)]

(1:46:28 PM) efried: interestingly, when I build it locally, the table has a border.
(1:47:44 PM) efried: aha
(1:47:53 PM) efried: sphinx version makes the difference.
(1:48:10 PM) efried: at 1.8.4, borders are there. At 2.0.1, gone.

[Matt Riedemann (mriedem)]

Maybe some regression with https://github.com/sphinx-doc/sphinx/issues/6113

[Eric Fried (efried)]

It's not 6113, or anywhere in the stylesheets. It's in the actual <table> tag, which used to have border="1" (at 1.8.5) and now (at 2.0.0) has no border attribute at all.

I filed and attached https://github.com/sphinx-doc/sphinx/issues/6312 against Sphinx.

[Ian Y. Choi (ianychoi)]

Addressed via https://review.opendev.org/#/c/661344/

[Stephen Finucane (stephenfinucane)]

Changing the order of the duplicates here since I tagged the fix against the other bug.