Docs: the releases and versioning.rst page has some formatting difficulties.

[pdp2shirts]

// Title: the releases and versioning.rst page has some formatting difficulties.

In the tables on this page, there are row separators that are not reflected well in the browser. for example, there is a section in the OpenShift section that has openShift origin in one row and OpenShift container platform in another row. With the next column being the versions of OpenShift that were tested. That column has the two rows merged so that there is no separator. On Safari, in particular, the two rows do not show up as differentiated, and the next column merged row appears as though only the OpenShift Origin row looks like there are versions which were tested.